【題目】 I will stay at home to play chess on the computer _____ it snows tomorrow.

A. if B. unless C. before D. after

【答案】A

【解析】

試題分析：句意：如果明天下雪，我將呆在家里在計算機上下象棋。A. if如果；B. unless除非；C. before之前；D. after之后。由句意可知選A。

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