【題目】Mary is the only one of the teachers who __________ a little Chinese because she is one of my friends who __________ been to China.

A. knows; have B. knows; has

C. know; have D. know; has

【答案】A

【解析】句意:瑪麗是唯一懂點漢語的老師,因為她是到過中國的我的朋友中的一位。定語從句中先行詞作主語，且由one of...修飾,先行詞為復(fù)數(shù),定語從句的謂語動詞也用復(fù)數(shù)形式；若one of前由the/the only/ the very/the right修飾,先行詞為one,定語從句的謂語動詞用單數(shù)形式。

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