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题目
[-B53] The experiment shows that proper amounts of exercise,if ______ regularly,can improve our
health.
A.being carried out
B.carrying out
C.carried out
D.to carry out
翻译并分析

提问时间:2020-08-03

答案
C 这里是省略了相同的主句及be动词,整句完整的话应该是:The experiment shows that proper amounts of exercise,if the proper amouts of exercise is carried out regularly,can improve our health.或者the prope...
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