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：句意：不要对他大吼大叫。他尽全力了。do one’s best意为“尽某人最大的努力”，do well in意为“在方面做得好”，be good at意为“擅长”，根据句意，他尽力了应该指的是过去的行为，应该用一般过去时；故选D。
