【題目】______ he will visit our school or not tomorrow is still not decided yet. If he ______,David will show him around the school.

A. If, will come B. If, comes

C. Whether, comes D. Whether, come

【答案】C

【解析】C第一空用whether引導(dǎo)主語從句，譯為“無論是否…”，if作“是否”講時，不能引導(dǎo)主語從句置于句首。第二句if引導(dǎo)條件狀語從句，用一般現(xiàn)在時代指將來時，主語是he，用第三人稱單數(shù)形式comes，故選C。

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