volleyball is her main focus, she’s also great at basketball.A Since B. Once C. Unless D.

发布时间：2020-08-16 22:46:10

     volleyball is her main focus, she’s also great at basketball.
A  Since   B. Once     C. Unless     D. While

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解析：考查从属连词。尽管排球是她的中心，她也擅长篮球。while引导让步状语从句。
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