问题补充:
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
答案:
A. in order
(答案→)B. in use
C. in danger
D. 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。