A.can't B.mustn't

C.needn't D.shouldn't

提示：考查情态动词。They can't be at home."他们不可能在家。"用can't+do表示对现在的否定推测。

答案：A

2.-What's the name?

-Khulaifi._________ I spell that for you?

A.Shall B.Would

C.Can D.Might

提示：考查情态动词。 shall 用于第一、三人称表示征求对方的意见，用于各人称表示警告、威胁、命令、强制等语气。

答案：A

3. So difficult _________ it to work out the problem that I decided to ask Tom for advice.

A.I have found B.have I found

C.I did find D.did I find

提示：so...that...结构位于句首，句子使用部分倒装。事情发生在过去，故用助动词did构成部分倒装。

答案：D

4. -I think I'll give Bob a ring.

-You _________.You haven't been in touch with him for ages.

A.will B.may

C.have to D.should

提示：考查情态动词。should在此句中表示"应该；应当"，从后面信息句"你们好几年没有联系了"可得到提示。

答案：D

5. My cousin came to see me from the country,_________ me a full basket of fresh fruits.

A.brought B.bringing

C.to bring D.had brought

提示：考查分词作伴随状语。my cousin和bring为逻辑上的主谓关系，故用现在分词作伴随状语。

答案：B