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问题
多选题
与1010相邻的两个数是[ ]
A.1110
B.1009
C.999
D.1011
答案
BD
选择题
By the time I got to the train station, the train _______ for ten minutes. I had to wait for the next one.
A. has left
B. has been away
C. had left
D. had been away
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解答题
英文字母“p”在视网膜上成的像是“b”．______．
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