Which of the following adverbial of time is unsuitable according to the sentence?Great changes have taken place in our home town ______ .
A. in the past
B. in the past few years
C. in recent years
D. in the last few years
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So far they ________ another power station.
A. have built
B. built
C. build
D. are building
This question ______ several times.
A. discussed
B. has discussed
C. is being discussed
D. has been discussed
18.Teaching methods ______ further improved with the development of education.
A. are to be
B. need
C. must
D. will
We ______ from our school by the end of next July.
A. shall graduate
B. have graduated
C. shall have graduated
D. are graduating
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