问题补充:
There are many CD-ROMs in the bookshop. I don’t know to buy.
A. what
B. which
C. when
D. how
答案:
A. what
(答案→)B. which
C. when
D. how
解析:词义辨析。句意:书店里有许多光碟。我不知道买哪个。所以选B,which作buy的宾语。
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