There are five chairs ,but I am at a loss which to buy .
A. to be chosen
B. to choose from
C. to choose
D. to be chosen from
网友回答
A. to be chosen
(答案→)B. to choose from
C. to choose
D. to be chosen from
解析：词义辨析.choose选择;choose from.虽然有五把椅子备选,但是我还是不知道买哪一把. 从语境可知,该空作定语修饰five pairs,且five pairs为该空所表动作的逻辑宾语,所以应填不定式to choose from作定语,表示“从……中挑选”,故选B。