问题描述：
I haven't seen Mr.White for weeks.
— What _____ to him?
A.must have happened B.may have happened
C.can have happened D.may happen
从题意可知,空格填表推测过去的选项,除d,而must+have+done在否定和疑问句是用can代替must,除a.但剩下的b和c都能可以,且may和can也有相同的意思,如何判断哪个啊?
What's wrong with your pen'?
— The ink ____ come out.
A.can't B.doesn't C.hasn't D.won' t
这题完全摸不着头脑,请给点好的解释吧
— What _____ to him?
A.must have happened B.may have happened
C.can have happened D.may happen
从题意可知,空格填表推测过去的选项,除d,而must+have+done在否定和疑问句是用can代替must,除a.但剩下的b和c都能可以,且may和can也有相同的意思,如何判断哪个啊?
What's wrong with your pen'?
— The ink ____ come out.
A.can't B.doesn't C.hasn't D.won' t
这题完全摸不着头脑,请给点好的解释吧
问题解答：
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