Is dangerous to swim in the river alone?A. itB. thisC. thatD. he

发布时间：2020-08-17 12:09:13

Is      dangerous to swim in the river alone?
A. it
B. this
C. that
D. he

网友回答

(答案→)A. it
B. this
C. that
D. he
解析：本句it为作形式主语，不定式短语放在后面作真正主语。
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