He couldn’t ______an appropriate answer to this problem just at the time.A、come

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问题 He couldn’t ______an appropriate answer to this problem just at the time.

选项 A、come up
B、come up with
C、come up against
D、come under

答案 B

解析本题为短语动词题。这里需要表示“提出(解决方法等)”的短语。选项A)表示“走近，发生”；选项B)意为“提出”；选项C)表示“遭遇到”；选项D)意为“遭受，归类”。所以答案为B)。

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