题目内容

【题目】— Mary happy today? — I don't think so. She look happy this morning.
A.Is; isn't
B.Is; doesn't
C.Does; doesn't
D.Does; isn't

【答案】B
【解析】句意:-玛丽今天高兴吗?—我不这样认为。今天早晨她看起来不高兴。上句缺少be动词,与形容词happy构词系表结构;后一句look是谓语动词,其否定形式借助助动词doesn't。所以答案是B。

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