Be careful not to your bike with so many heavy bags. A. turn offB. set offC. take offD. f

问题补充：

Be careful not to your bike with so many heavy bags.

A. turn off

B. set off

C. take off

D. fall off

答案：

A. turn off

B. set off

C. take off

(答案→)D. fall off

解析：句意：小心点。带这么沉重的袋子，别跌落了。turn off 关； set off 出发，动身；take off 脱下，起飞；fall off跌落。所以选D。