问题
While watching TV,____. [ ]
A: the door bell rang
B:AIDU_
C:/T
D: we heard the door bell rings
B:AIDU_
C:/T
D: we heard the door bell rings
正确答案是：
同类题型
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Do you know our town well?— No, this is the first time I _______ here
Some researchers believe that there is no doubt______acure for AIDS will be found