单项选择题
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.
A. Don’t shift the guy as you like. B. Don’t shift the stay as you like. C. Don’t move the derrick as you like. D. Don’t move the crane as you like.
A. Lower the derrick, please. B. Top the derrick, please. C. Swing the derrick, please. D. Adjust the derrick, please.