Question

【题目】John___ come to see us tonight, but he isn't very sure yet.

A. may B. can C. has to D. Must

Answer 1

【答案】A

【解析】句意：约翰今晚也许来看我们，但是他还没有确定。A. may 也许，（不很肯定）； B. can表示推测时“可能”，往往用于否定句或疑问句；故排除B；C. has to不得不，用于客观上的原因； D. must必须，表示推测“一定、准是”，语气较肯定，较有把握。根据 isn't very sure yet还没有确定。所以用推测可能性小的词may，故选A。