I know he hasn’t finished his homework but he has done his best. A. at allB. in allC. a

问题补充：

I know he hasn’t finished his homework, but , he has done his best.

A. at all

B. in all

C. after all

D. above all

答案：

A. at all

B. in all

(答案→)C. after all

D. above all

解析：句意：我知道他没有完成作业，但是毕竟他已经尽了他的最大努力了。A. at all 根本； B. in all 总共； C. after all 毕竟； D. above all 首先，最重要的。根据句意故选C。