__________ good exercise.A．Climbing hills isB．Climbing the hill isC．The climbing
题型：不详难度：来源：
__________ good exercise.| A．Climbing hills is | B．Climbing the hill is | | C．The climbing hills are | D．The climbing of hills are |
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答案
| A |
解析
| 考查动名词作主语。动名词短语作主语，hills泛指，不需要冠词，选A。 |
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