Read the following paragraph and cross out TWO irrelevant sentences on the answer sheet.
As psychologists who frequently travel for work,how we describe our careers to strangers in the airline seats next to us can determine the tone of the conversation for hours to come. For instance, the mere mention that we're psychologists prompts some people to open a book or pretend to fall asleep. Most passengers tend to sleep away their journey. In other cases,our expertise in mental matters seems to encourage our seatmates to unburden themselves. We can spend hours listening to the details of a failing marriage or a popular theory of motivation. A lack of motivation for achieving happiness in marriage concerns people greatly. Even pretending to be asleep doesn't seem to discourage our seatmates from asking us to interpret their dreams. On the few occasions we admit that we're not just general psychologists but that we actually study happiness for a living,we can be guaranteed a near-desperate response: "What can I do to be happier?”