2. 外语
  3. The mother was afraid to let the boy ______ the tree.

The mother was afraid to let the boy ______ the tree.

admin2013-09-28  39
问题 The mother was afraid to let the boy ______ the tree.
选项 A、to risk climbing
B、risk climbing
C、to risk to climb
D、risk to climb
答案B
解析 根据使役动词let的用法，后跟有不定式时不能有to，而动词risk只能跟动名词，所以正确答案是B。
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