on that day, the gentleman really did not_____ a.what to do b.how to do
问题描述：
on that day, the gentleman really did not_____ a.what to do b.how to do
答
答案是A
b错的原因是HOW 是疑问副词,不能作DO 的宾语.如果后面有宾语B也对,即how to do it = what to do
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