四、it类. Everyone knows that _______ is dangerous to play with fire, but _______ is difficult is to pr_刷题宝

题干

四、it类
. Everyone knows that _______ is dangerous to play with fire, but _______ is difficult is to prevent children from playing with fire.

A：it, it

B：what, what

C：it, what

D：what, it

上一题下一题 0.0难度选择题更新时间:2014-08-01 09:22:58

答案(点此获取答案解析）

D

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