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I have been trying to quit smoking.

A:pick up
B:give up
C:build up
D:take up

参考答案

参考解析
解析:本句意思:我一直都在努力戒烟。quit离开,退出,放弃。pick up捡起,获得;giVe up放弃,戒除;build up加强,加大,增多;take up占用,占据。
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