题目内容
21.[1999上海] There are five pairs ________ , but I'm at a loss which to buy.A. to be chosen B. to choose from
C. to choose D. for choosing
答案：B
提示：
提示：
| 题目考察动词不定式作定语的用法。注意be at a loss表示“茫然不知”的意思；注意准确理解题意“从五双鞋中选择”，所以会接连副词from
|
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