机动绞磨宜设置（）装置。不得采用松尾绳的方法卸荷。
A.保护
B.防滑
C.过载保护
D.动力保护
参考答案：C
— Shall we play basketball this afternoon?
— _____ I need to exercise very much. [ ]
A. Why not?
B. I agree with him.
C. You are lucky.
D. No, I don't want to.
