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问题: There are five pairs ____, but I’m at a loss which to buy.

There are five pairs ____, but I’m at a loss which to buy.
A. to be chosen from
B. to choose from
C. to choose
D. for choosing

我觉得A,D 对,但是答案是B,请大家帮我解释一下?



解答:

此题应该考虑到在答案中,from是介词,它需要加宾语。在句子中,five pairs是from 的宾语,所以应该是choose from five pairs。如果你选择答案A,应该是five pairs被选择,也就是五双被选,所以错误。如果你选择答案D,five pairs仍然是选择的宾语,所以也被排除,答案C道理相同。最后我们选择答案B,意为“有五双可以供选择,但是我不知道买哪一个。