题目内容
There are five pairs ________, but I am at a loss ________.
[ ]
A.to choose from, what to buy
B.to choose, which to buy
C.to choose from, which to buy
D.to be chosen, which to buy
答案:C
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题目内容
There are five pairs ________, but I am at a loss ________.
A.to choose from, what to buy
B.to choose, which to buy
C.to choose from, which to buy
D.to be chosen, which to buy