问题
选择题
Look, Sally looks unhappy, what _____ the problem?
A. seem to be B. seems to be C. seem that
答案
答案：B
这题考查情态动词seem的用法：seem to be“似乎是”，主语是problem，所以用seems，句意是：看Sally看上去不高兴，问题似乎是什么？
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