Once new difficulties ________in your work, it’s always important to use your brains.
A.arise B.raise C.arouse D.rise
--How are your recent trip to Sichuan?
—I’ve never had ______ one before.
A.a pleasant B.a more pleasant
C.a most pleasant D.the most pleasant
Shy people often avoid situations would force them into close contact with other people．
A．which B．where C．when D．what
—How long do you think it will be______ man can finally solve the problem of cancer?
—Well，it depends
A．when B．until C．after D．before
______ is known to us is that tobacco contains nicotine and other harmful products, so you should give up smoking.
A.As B.It C.What D.Which
假定你是中学生李华，你的美国笔友Paul想了解一下中国的用餐习俗。请写一封英文邮件向他作简要介绍。要点如下:
1.主人请客人先人座；
注意:1.词数100左右； 2.可以适当增加细节，以使行文连贯。
Dear Paul,
____________________________________________________________________________________________
________________________________________________________________
Yours truly,
Li Hua
