The Importance of Friendship for School-age ChildrenFriends are very important to school-age children's healthy (health)development.Research has 41____ (show) that children who lack friends can suffer from emotional and mental difficulties later in life.They have also found that children with friends have a 42____ (great) sense of happiness,better self-esteem and fewer problems as they grow up.Friendships provide children with more than just fun 43____ (playmate).They help children develop emotionally and 44____ (moral).In interacting with friends,children learn many 45____ (society)skills,such as how to communicate,and how to cooperate.They practice 46____ (control)their emotions and responding to the emotions of others.They develop their 47____ (able)to think through and negotiate different situations in their relationships.Having friends 48____ (affect)children in many ways,even their school 49____ (perform).Children tend to have better attitudes about school and learning when they have friends there.In short,friendships are not just a luxury,they are a 50____ (necessary)for children.

某英语学习报征集一篇题为“My Dream Trip”的稿件。请就此题目写一篇英文短文应征，内容包括：·你最想去哪里旅游·为什么你最想去那里

Why Dogs Bury Their Favorite BonesYou may find it crazy that your dog buries his favorite bone or chew toy, only to dig it up a day or two later, but there is actually a reason behind it——it is simply in their nature. For thousands of years, dogs have buried their bones. The practice itself started long before dogs were even pets when they had to bury bones to survive.When dogs lived in the wild, sometimes food was scarce. If they were able to find food,dogs became very protective of it, Sometimes they would have more bones than they could eat for one meal. To keep other dogs and animals from stealing their bones, dogs would bury them in the ground. When it was time for the next meal, they would dig up their bones and enjoy them again. This would continue until the bones were gone.Even though most dogs have plenty of food to eat today, their instincts still tell them to bury their bones and favorite toys. They do this to keep other dogs and animals from stealing them, just like their ancestors did. Some dogs keep at least two bones buried at once. When they want to dig up one, they wil bury one more. This may leave a backyard full of holes and bones.How do dogs decide where to bury their bones? A dog cannot bury a bone just anywhere.He must first find the perfect spot. This involves using his nose to find a spot that is free from other dogs and animals. Often it is near a tree or a large rock, but it could be anywhere in the yard. Once the dog finds the perfect spot, he uses his front paws to dig a hole, drops the bone in and covers up the hole to protect his treasure.Dogs bury their favorite bones or chew toys by nature.

Why Dogs Bury Their Favorite BonesYou may find it crazy that your dog buries his favorite bone or chew toy, only to dig it up a day or two later, but there is actually a reason behind it——it is simply in their nature. For thousands of years, dogs have buried their bones. The practice itself started long before dogs were even pets when they had to bury bones to survive.When dogs lived in the wild, sometimes food was scarce. If they were able to find food,dogs became very protective of it, Sometimes they would have more bones than they could eat for one meal. To keep other dogs and animals from stealing their bones, dogs would bury them in the ground. When it was time for the next meal, they would dig up their bones and enjoy them again. This would continue until the bones were gone.Even though most dogs have plenty of food to eat today, their instincts still tell them to bury their bones and favorite toys. They do this to keep other dogs and animals from stealing them, just like their ancestors did. Some dogs keep at least two bones buried at once. When they want to dig up one, they wil bury one more. This may leave a backyard full of holes and bones.How do dogs decide where to bury their bones? A dog cannot bury a bone just anywhere.He must first find the perfect spot. This involves using his nose to find a spot that is free from other dogs and animals. Often it is near a tree or a large rock, but it could be anywhere in the yard. Once the dog finds the perfect spot, he uses his front paws to dig a hole, drops the bone in and covers up the hole to protect his treasure.Dogs started to bury their bones when they became pets.

Why Dogs Bury Their Favorite BonesYou may find it crazy that your dog buries his favorite bone or chew toy, only to dig it up a day or two later, but there is actually a reason behind it——it is simply in their nature. For thousands of years, dogs have buried their bones. The practice itself started long before dogs were even pets when they had to bury bones to survive.When dogs lived in the wild, sometimes food was scarce. If they were able to find food,dogs became very protective of it, Sometimes they would have more bones than they could eat for one meal. To keep other dogs and animals from stealing their bones, dogs would bury them in the ground. When it was time for the next meal, they would dig up their bones and enjoy them again. This would continue until the bones were gone.Even though most dogs have plenty of food to eat today, their instincts still tell them to bury their bones and favorite toys. They do this to keep other dogs and animals from stealing them, just like their ancestors did. Some dogs keep at least two bones buried at once. When they want to dig up one, they wil bury one more. This may leave a backyard full of holes and bones.How do dogs decide where to bury their bones? A dog cannot bury a bone just anywhere.He must first find the perfect spot. This involves using his nose to find a spot that is free from other dogs and animals. Often it is near a tree or a large rock, but it could be anywhere in the yard. Once the dog finds the perfect spot, he uses his front paws to dig a hole, drops the bone in and covers up the hole to protect his treasure.Dogs in the wild occasionally had enough food.

Why Dogs Bury Their Favorite BonesYou may find it crazy that your dog buries his favorite bone or chew toy, only to dig it up a day or two later, but there is actually a reason behind it——it is simply in their nature. For thousands of years, dogs have buried their bones. The practice itself started long before dogs were even pets when they had to bury bones to survive.When dogs lived in the wild, sometimes food was scarce. If they were able to find food,dogs became very protective of it, Sometimes they would have more bones than they could eat for one meal. To keep other dogs and animals from stealing their bones, dogs would bury them in the ground. When it was time for the next meal, they would dig up their bones and enjoy them again. This would continue until the bones were gone.Even though most dogs have plenty of food to eat today, their instincts still tell them to bury their bones and favorite toys. They do this to keep other dogs and animals from stealing them, just like their ancestors did. Some dogs keep at least two bones buried at once. When they want to dig up one, they wil bury one more. This may leave a backyard full of holes and bones.How do dogs decide where to bury their bones? A dog cannot bury a bone just anywhere.He must first find the perfect spot. This involves using his nose to find a spot that is free from other dogs and animals. Often it is near a tree or a large rock, but it could be anywhere in the yard. Once the dog finds the perfect spot, he uses his front paws to dig a hole, drops the bone in and covers up the hole to protect his treasure.Dogs would bury their extra food for their babies.

Why Dogs Bury Their Favorite BonesYou may find it crazy that your dog buries his favorite bone or chew toy, only to dig it up a day or two later, but there is actually a reason behind it——it is simply in their nature. For thousands of years, dogs have buried their bones. The practice itself started long before dogs were even pets when they had to bury bones to survive.When dogs lived in the wild, sometimes food was scarce. If they were able to find food,dogs became very protective of it, Sometimes they would have more bones than they could eat for one meal. To keep other dogs and animals from stealing their bones, dogs would bury them in the ground. When it was time for the next meal, they would dig up their bones and enjoy them again. This would continue until the bones were gone.Even though most dogs have plenty of food to eat today, their instincts still tell them to bury their bones and favorite toys. They do this to keep other dogs and animals from stealing them, just like their ancestors did. Some dogs keep at least two bones buried at once. When they want to dig up one, they wil bury one more. This may leave a backyard full of holes and bones.How do dogs decide where to bury their bones? A dog cannot bury a bone just anywhere.He must first find the perfect spot. This involves using his nose to find a spot that is free from other dogs and animals. Often it is near a tree or a large rock, but it could be anywhere in the yard. Once the dog finds the perfect spot, he uses his front paws to dig a hole, drops the bone in and covers up the hole to protect his treasure.Animals would start a fierce fight over food in ancient times

Why Dogs Bury Their Favorite BonesYou may find it crazy that your dog buries his favorite bone or chew toy, only to dig it up a day or two later, but there is actually a reason behind it——it is simply in their nature. For thousands of years, dogs have buried their bones. The practice itself started long before dogs were even pets when they had to bury bones to survive.When dogs lived in the wild, sometimes food was scarce. If they were able to find food,dogs became very protective of it, Sometimes they would have more bones than they could eat for one meal. To keep other dogs and animals from stealing their bones, dogs would bury them in the ground. When it was time for the next meal, they would dig up their bones and enjoy them again. This would continue until the bones were gone.Even though most dogs have plenty of food to eat today, their instincts still tell them to bury their bones and favorite toys. They do this to keep other dogs and animals from stealing them, just like their ancestors did. Some dogs keep at least two bones buried at once. When they want to dig up one, they wil bury one more. This may leave a backyard full of holes and bones.How do dogs decide where to bury their bones? A dog cannot bury a bone just anywhere.He must first find the perfect spot. This involves using his nose to find a spot that is free from other dogs and animals. Often it is near a tree or a large rock, but it could be anywhere in the yard. Once the dog finds the perfect spot, he uses his front paws to dig a hole, drops the bone in and covers up the hole to protect his treasure.Some dogs tend to store up more than one bone at the same time.

Why Dogs Bury Their Favorite BonesYou may find it crazy that your dog buries his favorite bone or chew toy, only to dig it up a day or two later, but there is actually a reason behind it——it is simply in their nature. For thousands of years, dogs have buried their bones. The practice itself started long before dogs were even pets when they had to bury bones to survive.When dogs lived in the wild, sometimes food was scarce. If they were able to find food,dogs became very protective of it, Sometimes they would have more bones than they could eat for one meal. To keep other dogs and animals from stealing their bones, dogs would bury them in the ground. When it was time for the next meal, they would dig up their bones and enjoy them again. This would continue until the bones were gone.Even though most dogs have plenty of food to eat today, their instincts still tell them to bury their bones and favorite toys. They do this to keep other dogs and animals from stealing them, just like their ancestors did. Some dogs keep at least two bones buried at once. When they want to dig up one, they wil bury one more. This may leave a backyard full of holes and bones.How do dogs decide where to bury their bones? A dog cannot bury a bone just anywhere.He must first find the perfect spot. This involves using his nose to find a spot that is free from other dogs and animals. Often it is near a tree or a large rock, but it could be anywhere in the yard. Once the dog finds the perfect spot, he uses his front paws to dig a hole, drops the bone in and covers up the hole to protect his treasure.The backyard of a dog owner may be full of holes dug by his dog.

Why Dogs Bury Their Favorite BonesYou may find it crazy that your dog buries his favorite bone or chew toy, only to dig it up a day or two later, but there is actually a reason behind it——it is simply in their nature. For thousands of years, dogs have buried their bones. The practice itself started long before dogs were even pets when they had to bury bones to survive.When dogs lived in the wild, sometimes food was scarce. If they were able to find food,dogs became very protective of it, Sometimes they would have more bones than they could eat for one meal. To keep other dogs and animals from stealing their bones, dogs would bury them in the ground. When it was time for the next meal, they would dig up their bones and enjoy them again. This would continue until the bones were gone.Even though most dogs have plenty of food to eat today, their instincts still tell them to bury their bones and favorite toys. They do this to keep other dogs and animals from stealing them, just like their ancestors did. Some dogs keep at least two bones buried at once. When they want to dig up one, they wil bury one more. This may leave a backyard full of holes and bones.How do dogs decide where to bury their bones? A dog cannot bury a bone just anywhere.He must first find the perfect spot. This involves using his nose to find a spot that is free from other dogs and animals. Often it is near a tree or a large rock, but it could be anywhere in the yard. Once the dog finds the perfect spot, he uses his front paws to dig a hole, drops the bone in and covers up the hole to protect his treasure.Dogs often bury their bones far away from trees.