问题补充：
I have no idea is better, so I took of them.
A. what, both
B. what, none
C. which, both
D. which, all
答案：
A. what, both
B. what, none
(答案→)C. which, both
D. which, all
解析：这题考查同位语从句，句意是：我不知道哪个更好，因为是better，所以是两者，选C。句意是:我不知道哪个更好，所以我两个都买了。选C。
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