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问题: He was _____speaking.A.quick in B.quick at

选那个 为什么?

解答:

我觉得应该选B
quick at sth. means intelligent; competent聪明的;有能力的
e.g. His spelling is poor but he's very quick at figures.(他拼写差,但算术好.)
所以 He was quick at speaking. 的意思是 他善于演讲(或交谈)