1、John fell asleep ________ he was listening to the music.
A.after
B.before
C.while
D.as soon as
2、________ of the land in that district ________ covered with trees and grass.
A.Two fifth; is
B.Two fifth; are
C.Two fifths; is
D.Two fifths; are
3、Since nobody gave him any help, he ________ have done the research on his own
A.can
B.must
C.would
D.need
4、________ everyone here, I wish you a pleasant journey back to your country.
A.By means of
B.On behalf of
C.In search of
D.For fear of
答案解析:
1.【答案】C。解析:考查语从句。句意:约翰在听音乐的时候睡着了。after在……之后,before在……之前,while当……时候,as soon as一……就。“表示在干某事时发生了某个事情”通常用while,故选C。
2.【答案】C。解析:考查数词与主谓一致。句意:该地区五分之二的土地为草和森林所覆盖。分数的表达式“基数词+序数词”,分子大于1,分母加s;land为不可数名词,故谓语动词用单数,故选C。
3.【答案】B。解析:情态动词。can have done和need have done主要用于否定句和疑问句中;must have done表示对过去情况的肯定推测,意为“一定已经做了某事”;would have done表示与过去事实相反的假设。根据句意可知,此处表示的是对过去情况的肯定推测,所以应用must have done。故选B。
4.【答案】B。解析:考查介词短语辨析。句意:我代表这里的每个人”,祝愿你回国的旅途愉快。by means of意为“用;凭借”;on behalf of意为“代表”;in search of意为“寻找”;for fear of意为“担心”。故选B。
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