问题补充:
With the development of science and technology, people’s life in the past few years.
A. improved
B. has improved
C. is improving
D. had improved
答案:
A. improved
(答案→)B. has improved
C. is improving
D. had improved
解析:根据句子后面的时间状语in the past few years可以知道句子应该使用现在完成时。
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