7. As a simple and convenient way to get   latest fashions online, online shopping also has    major problem―you can't see whether they fit or not.

A. the; the      B.   /; the

C. the; a       D.  /； /

7. C考查冠詞的用法。latest意為"最新的"，形容詞最高級(jí)前需加定冠詞the,故排除B、D;泛指一個(gè)，用不定冠詞a/an。一個(gè)主要問(wèn)題a major problem,故選C。

題目來(lái)源：2015全品語(yǔ)法快練高中英語(yǔ)新課標(biāo) > 訓(xùn)練12詞類綜合訓(xùn)練

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