The experiment shows that proper amounts of exercise, if ___ regularly, can impr
题型：不详难度：来源：
The experiment shows that proper amounts of exercise, if ___ regularly, can improve our health.| A．being carried out | B．carrying out | C．to carry out | D．carried out |
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答案
| D |
解析
| 本题考查if条件句中的省略情况。本句的句子的主语是theexperiment；谓语动词是shows；that引导宾语从句,宾语从句的主干事：proper amounts of exercise can improve our health,if_____regularly是插入的条件从句,从句的主语是proper amounts of exercise,此时应用it代替前面提到的主语,条件句的主语与主句的主语一致,并且含有is,故省略了itis,完整形式是：if it is carried out。句意为：这项实验表明,适当的运动,如果有规律的进行,能够有助于我们的身体健康。 |
举一反三
When for his views about his teaching job, Philip said he found it very interesting and rewarding. | A．asking | B．asked | C．having asked | D．to be asked |
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_____ in a white uniform, he looks more like a cook than a doctor.| A．Dressed | B．To dress | C．Dressing | D．Having dressed |
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Film has a much shorter history, especially when such art forms as music and painting.| A．having compared to | B．comparing to | | C．compare to | D．compared to |
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_______ with care, one tin will last for six weeks.| A．Use | B．Using | C．Used | D．To use |
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After completing and signing it, please return the form to us in the envelope _____.| A．providing | B．provided | C．having provided | D．provide |
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