◎ 题干
— Why isn't Cathy here yet?
— She _____ to be picked up at the station.
[     ]
A. could wait
B. must wait
C. might be waiting
D. can be waiting
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— Why isn't Cathy here yet? — She _____ to be picked up at the station. [ ]A. could wait B. must waitC. might be waiting D. can be waiting …”主要考查了你对  【现在进行时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。