Before the conference, a new problem came up could speak on behalf of our group. A. thatB

发布时间：2020-08-16 12:32:49

Before the conference, a new problem came up      could speak on behalf of our group.
A. that
B. who
C. which
D. how

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A. that
(答案→)B. who
C. which
D. how
解析：考查名词性从句。句中who引导宾语从句，在从句中作主语。句意：在会议之前，一个新的问题出现了，谁能够代表我们组发言。
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