【題目】 We are not sure if it________ tomorrow. If it________， we won’t climb the South Hill.

A. will snow； snows

B. will snow； will snow

C. snows； snows

D. snows； will snow

【答案】A

【解析】

試題分析：句意：我們不確定明天是否會下雪。如果下雪，我們就不去爬山。連詞if有兩種用法，一是引導賓語從句，意思是“是否”，當主句是一般現(xiàn)在時態(tài)時，從句可為需要的任意時態(tài)；二是引導條件狀語從句，意思是“如果”， 時態(tài)遵循“主將從現(xiàn)”。所以選A。

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