The ground is slippery. Hold on to the rope and don’t . A. put offB. turn up C. let go D.

问题补充：

The ground is slippery. Hold on to the rope and don’t .

A. put off

B. turn up

C. let go

D. take apart

答案：

A. put off

B. turn up

(答案→)C. let go

D. take apart

解析：slippery(地面)滑的；hold on to抓住不放；let go放开，松手。