For a green-hand babysitter, it seems a very difficult task______.

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问题 For a green-hand babysitter, it seems a very difficult task______.

选项 A、to stop the child to cry
B、to stop the child crying
C、stopping the child to cry
D、stop the child crying

答案B

解析 本题考查动词不定式做主语的用法。首先从选项来看,“阻止某人做某事”的表达方式应该是stop sb.(from)doing sth.,所以排除A和C。另外,it只是句子的形式主语,真正的主语应该是后面的动词不定式,所以选择B。
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