问题补充:
They are both very nice.I don’t know
A. what to choose
B. to choose what
C. which one to choose
D. to choose which one
答案:
A. what to choose
B. to choose what
(答案→)C. which one to choose
D. to choose which one
解析:what意思是什么,一般对未知的具体事物进行提问。Which意思是哪一个,一般对特定对象中的哪一个进行提问。句意:我们都非常不错。我不知道选哪一个。Which指代前文提到的任何一个,故选C。