The experiment shows that proper amounts of exercise, if _____ regularly, can im
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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 |
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答案
C |
解析
试题分析:考查状语从句的省略。。当状语从句的主语与主句的主语一致,且状语从句中有系动词be的时候,可以把状语从句的主语和be动词一起省略。本句在if后面省略了proper amounts of exercise is;句意:这个实验显示,如果适当数量的锻炼被经常进行,这样的锻炼能够改善我们的健康状态。故C正确。 点评:当状语从句的主语与主句的主语一致,且状语从句中有系动词be的时候,可以把状语从句的主语和be动词一起省略。如果状语从句中有it is的时候,it is 也可以省略。 |
举一反三
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