1. Peter (   ) come with us tonight, but he isn’t very sure yet.　　

A.must                     B.may                      C.can                        D.will　　

答案選B。因?yàn)楹笪恼f他還不是很有把握，只是“可能”會(huì)來，故用may表推測。　　

2. A computer (   ) think for itself; it must be told what to do.　　

A.can’t                     B.couldn’t                 C.need                     D.would　　

答案選A。can’t表示“不能”，意思是“電腦不能自己思考，必須要告訴它如何做。　　

3. Jenny (  ) have kept her word. I wonder why she changed her mind.　　

A.must                     B.should                   C.need                     D.would　　

答案選B。此題的語境背景是“本來應(yīng)該遵守諾言，但卻改變了主意”，表示“本來應(yīng)該”，用should+have+過去分詞。　　

4. --Could I borrow your dictionary? --Yes,of course you (    ).　　

A.might                    B.will                       C.can                      D.should　　

答案選C。can在此表示“可以”。　　

5. --I heard they went skiing in the mountains last winter.　　

--It (   ) true because there was little snow there.　　

A.may not be            B.won’t be                C.couldn’t be          D.must n’t be　　

答案為C。表否定推測，意為“不可能”。