题目内容
Helen ______ go on the trip with us, but she isn’t quite sure yet.
A. shall B. must C. may D. can
C
解析:
may也许,口气不肯定,另外后句的she isn’t puite sure yet.已给出暗示。shall用在陈述句中与第二、三人称连用表示允诺,命令等。must:必须can:能够,也可表“推测”但常用于否定句。
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