题目内容
When he was opening the door, he was ___________ that he was being followed by a policeman.
| A.conscious | B.casual | C.careful | D.doubtful |
A
词义辨析. A.意识到的;自觉的 B.随便的;临时的 C.认真的 D. 可疑的.句意:当他打开门,他意识到他被一个警察跟着.选A.
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