题目内容
- It’s _____ hard problem for the twins that ____ of them can work it out.
A. so; neither B. such a; neither
C. so a; neither D. such a; none
【答案】
B
【解析】such+a+adj+n[C]单数,根据前文内容the twin,neither of表示两者都不,故选B

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