Look, Sally looks unhappy, what the problem?A. seem to be B. seems to be C. seem that

发布时间：2020-08-20 20:39:47

Look, Sally looks unhappy, what      the problem?
A. seem to be   B. seems to be   C. seem that

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解析：
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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