[-B53] The experiment shows that proper amounts of exercise,

[-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
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chenbaming 幼苗

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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 proper amouts of exercise 可以用it代替.

1年前

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