题目内容
19．Peter ________ be really difficult at times even though he's a nice person in general．（ ）| A． | shall | B． | should | C． | can | D． | must |
分析 Peter有时候会真的很难相处，虽然总体而言他是个好人．
解答 答案：C
解析：A：将（第一人称）；警告；命令；允诺（第二、三人称）；B：应该；C：可能；D：必须．根据句意"Peter有时候会真的很难相处，虽然总体而言他是个好人"可知本题答案为C选项，其余选项均不符合题意．拓展：can在肯定句中表"可能性"时是表示"理论上的可能性"，而不是表示具体某事发生的可能性，表示这样的意思时要用could，may 或might．
点评 本题考查情态动词，做此类题目时一定要先分析各个选项的含义及其用法再结合句意选出正确答案．
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