单选from time to time we must look up words___A.the meaning of which we do not knowB.whose meaning we are not familiarC.we do not know their meaningsD.whose meanings we do not know

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单选from time to time we must look up words___A.the meaning of which we do not knowB.whose meaning we are not familiarC.we do not know their meaningsD.whose meanings we do not know

单选from time to time we must look up words___A.the meaning of which we do not knowB.whose meaning we are not familiarC.we do not know their meaningsD.whose meanings we do not know
单选from time to time we must look up words___
A.the meaning of which we do not know
B.whose meaning we are not familiar
C.we do not know their meanings
D.whose meanings we do not know

单选from time to time we must look up words___A.the meaning of which we do not knowB.whose meaning we are not familiarC.we do not know their meaningsD.whose meanings we do not know
答案应该是个定语从句,这个定语从句修饰words.
第一,定语从句的结构是先行词+句子.先行词在从句中替代该定语从句要修饰的名词.
第二,先行词是代词,某些代词比如whose\where可以等同介词+代词的结构,但不可能是the meaning of which这种名词结构.
第三,先行词后面引导的应当是个语序正常的完整句子.
本题中,这个从句原本应当表达 we do not know the meanings of the words.或者we do not know the words' meanings.主语we 谓语do not know 宾语 the meanings.words在里面是meanings的定语.先行词替代的是words,其它成分应当语序不变,介词虽然不符合习惯,但按照严格语法可以提前.
也就是说,这里可以用whose meanings we do not know,也可以用of which we do not know the meanings.但是不可能把the meanings 提前,打乱句子正常的语法结构.

名词words先行词是复数,后面的定语从句用引导词whose.

这个句子先行词是words,如果选A,先行词就变成了the meaning