试题详情
- 单项选择题我们的重吊杆已经长时间不用了。（）
A、Our derrick has been out of use for a long time.
B、Our heavy derrick has been out of use for a long time.
C、Our crane has been out of use for a long time.
D、Our winch has been out of use for a long time.
- B
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