问题描述：
why not 后面+let sb do还是to let sb do?
Why not __?
A let him to go home B to let him go home C let him go home D to let him to go home
选哪一个?
Why not __?
A let him to go home B to let him go home C let him go home D to let him to go home
选哪一个?
问题解答：
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