It is a surprise for me to see that these old-fashioned machines are still in the big cit

It is a surprise for me to see that these old-fashioned machines are still in the big city.
A. in order
B. in use
C. in danger
D. in difficulty

A. in order(答案→)B. in useC. in dangerD. in difficulty解析：考查介词短语：A. in order秩序井然B. in use在使用C. in danger有危险D. in difficulty有困难，句意：看见这么旧式的机器在这个大城市还在使用她感到很惊讶。选B。

这个答案应该是对的

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