When _______ at the door, she was given a warm welcome.

He was warned _______ he should make the same mistake again.

You will see to ________ the engine does not get out of order.

________ that John should have passed the examination.

I have never been to New York, but it’s the place _________ .

Government reports, examination compositions, legal documents and most business letters are the main situations ________ formal language is used

The young man speaks Japanese fluently as if he _______ a Japanese.

You cannot be __________ careful in making the decision as it was such a critical case.

A good writer is ________ who can express the commonplace in an uncommon way.

At last she left the room and hurried to the airport only _______ the plane flying away.