问题补充：
Don’t shout at him. He .
A. will do his best
B. did well in
C. is good at
D. did his best
答案：
A. will do his best
B. did well in
C. is good at
(答案→)D. did his best
解析：do one’s best 尽最大努力；do well in sth 在……方面做的好；be good at 擅长……。从本题题意来看，应是觉得他做的不够好才对他喊叫，故下文用过去时态。句意，不要对他大喊大叫。他已经尽力了。选D最符合逻辑关系。
