Mary and I have been close friends ______ we met each other 10 years ago.

A．when            B．since             C．until             D．a(chǎn)s

 

【答案】

B

【解析】

試題分析：考查連詞和時(shí)態(tài)用法。本題的四個(gè)選項(xiàng)中只有since引導(dǎo)的從句前面的主句使用完成時(shí)。句意：自從我們10年前見面到現(xiàn)在Mary和我一直都是親密的好朋友。故B正確。

考點(diǎn)：考查連詞和時(shí)態(tài)用法

點(diǎn)評(píng)：時(shí)態(tài)題的考查關(guān)鍵是抓住句子的上下文含義和句中的時(shí)間狀語。要根據(jù)時(shí)間狀語來選擇合適的時(shí)態(tài)，在平時(shí)的學(xué)習(xí)中要注意積累有關(guān)時(shí)態(tài)的用法和各種時(shí)態(tài)的特殊之處。如since， so far等經(jīng)常與現(xiàn)在完成時(shí)連用。在條件狀語從句中用一般現(xiàn)在時(shí)代替將來時(shí)等等。

 

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