They _ very happy A look at B look C are looking D looking 为什么要选B 而不选C 呢

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They_veryhappyAlookatBlookCarelookingDlooking为什么要选B而不选C呢They_veryhappyAlookatBlookCarelookingDlookin

They _ very happy A look at B look C are looking D looking 为什么要选B 而不选C 呢
They _ very happy A look at B look C are looking D looking 为什么要选B 而不选C 呢

They _ very happy A look at B look C are looking D looking 为什么要选B 而不选C 呢
B look
他们看起来非常快乐
这里look是系动词,不能用进行时态

look 在这里是系动词,系动词没有进行时和被动式。。。

b选项,look此时为系动词 ,表示看上去怎么样,系动词后面一般接形容词,look beautiful 看上去漂亮
c选项,这个时候的look为动词,表示看的意思,接宾语时要用介词连接,they are looking at the blackbord
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