1. They ______ on the program for almost one week before I joined them, and now we _____on it as no good results have come out so far.
A. had been working; are still working B. had worked; were still working
C. have been working; have worked D. have worked; are still working
解析:此题的时间参照点是before I joined them,,所以第一个空应该用过去完成进行时,第二个空根据时间now用现在进行时。
答案:A
2. It would be a good idea to use a plastic bottle, ___cut off, as a container to grow young plants in.
A. of which the top B. the top is C. the top of which D. with its top
解析:此题是独立主格结构,如果题干改为____is cut off,答案则为A或C
答案:A.C
3. ______ is it _____ has made Peter _____ he is today?
A. What; that; that B. That; that; what C. What; what; that D. What; that; what
解析:用还原法则为It is what that has made Peter what he is today可知是强调句式。
答案:D
4. Before he went abroad,he spent as much time as he _____ English.
A. could learning B. learned C. to learn D. could to learn
解析:spend time (in) doing sth如果改为he did what he ______,则答案为could to learn.
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