He has two Chinese-English dictionaries, ______ were bought last week.

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问题 He has two Chinese-English dictionaries, ______ were bought last week.

选项 A、two of which
B、both of which
C、both of them
D、all of them

答案B

解析 本题属于介词同关系代词连用的情形之一。of表示“在……当中”,which引导定语从句,并 指代前面的先行词,如果先行词是人时,要用whom。of which/whom前可以加名词、代词、数词、形 容词最高级等。例如:I met some job-hunters,several of whom were university students.(我碰到一 些求职者,其中有一些是大学生。)
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