【題目】_______ I could express my thanks to the traveler, he had already disappeared in the rain.

A. Before B. When C. Until D. While

【答案】A

【解析】

試題分析：考查連詞的辨析。A在...之前，還未來得及；B當(dāng)...時，C直到，D當(dāng)...時，由句意判斷后句的事是發(fā)生在前句的事之前，句意為：我還未來得及向那個旅行者表達我的感謝，他已經(jīng)消失在雨中了。故選A。

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