【題目】How can you expect him to make any progress ______ you never give him a chance to have a try?

A．when B．unless C．once D．until

【答案】A

【解析】

試題分析：考察連詞辨析。A. 當…時B.除非 C. 一旦D.直到 。句意：當你從未給他機會去嘗試，你怎么能期待他取得進步呢？故選A。

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