1．Yuan Longping is an expert(专家) on agriculture.
2．I can't stand(忍受) the noise.Can you turn your radio down?
3．Helen prefers(更喜欢) to stay at home rather than see a boring film.
4．My aunt has decided to have two meals a day to go on a diet(节食)．She always complains about her weight.
5．My husband is under stress(压力) because he has too much work to do in his business.
6．I may not be able to solve your problem but I can at least help.
7．Why don't you put an advertisement in the newspaper to sell your house?
8．When you speak or give a presentation，try to speak clearly.
9．It was really a challenge to speak before such a large audience.
10．There was no doubt that their support made a difference in our plan.
