题目内容
_________ the animals _________ our duty.
| A.To protect; are | B.Protecting; are |
| C.To protect; is | D.To protecting; is |
C
解析试题分析:句意:保护动物是我们的责任。动名词或动词不定式都可以做句子的主语,但是都看做单数。根据排除AB,D结构错误,故选C。
考点:考查动词不定式及主谓一致的用法。
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