Question

英语高手来啊!!!!!

这个题为啥选C不选A?
[ ]43. He ___________ know where her house is.
A. maybe B. may be C. may D. must be

是不是将句中的know改成knows 就可以选A了（请讲详细一点）

Answer 1

选B。。这里as
much
time
as
he
could
是修饰前面动词spend的状语，后文为不定式，表目的。。所以这一道题也就是(he
spend
as
much
time
as
he
could)(to
study)..