题目内容：

What a pity!Considering his ability and experience,he_____better.
A.need have done    B.must have done    C.can have done    D.might have done
My newly-bought cell phone isn't in my bag.Where____ I have put it?
A.can   B.must    C.should   D.would
The biggest problem for most plants,which____just get up and run away when threatened,is that animals like to eat them.
A.shan't    B.can't   C.needn't    D.mustn't


English is a language that many people around the world__not speak perfectly but__at least understand.
A.would...might B.will...must C.might...could D.can...may
---Would you go out for a walk with me
----No,I__.My girl friend is coming.
A.wouldn't B.shall not C.won't D.shouldn't

优质解答

1、选择B分析如下：A、 need have done　本需要做（而事实上没有做）B、must have done 对过去的事情的推测C、can/could have done 表推测一般用在否定句和疑问句中,表示不相信或怀疑的态度.D、might have done　本...