【題目】They ______ friends since they met in Shanghai．

A. haven't beenB. have been

C. aren'tD. are

【答案】B

【解析】

句意：自從他們?cè)谏虾Ｓ鲆?jiàn)后就成了朋友。

根據(jù)since可知主句用現(xiàn)在完成時(shí)態(tài)，結(jié)構(gòu)是have/has+過(guò)去分詞，排除C/D；根據(jù)句意since they met in Shanghai可知是自從上海遇見(jiàn)后就成了朋友；故選B。

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