My father is _____ to play tennis every Sunday.[ ]

A. enough active still

B. enough still active

C. still active enough

D. still enough active

托收业务中，托收行与代收行办理业务的依据是（）。

A.进出口商之间的合同

B.托收指示

C.国际商会的《托收统一规则》

D.托收行与代收行之间签署的代理行协议