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which of the twice sisiters is a doctor.[选择填空]
which of the twice sisiters is a doctor?
____are
A.All
B bOTH
C Either
D NEither
最好说说理由!
人气:299 ℃ 时间:2020-04-09 10:41:55
解答
B因为后边是复数形式cd均单数
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