Mike is good at playing basketball Bruce does well in football .A. whenB. untilC. sinceD.

问题补充：

Mike is good at playing basketball Bruce does well in football .

A. when

B. until

C. since

D. while

答案：

A. when

B. until

C. since

(答案→)D. while

解析：句意：迈克擅长打篮球，而布鲁斯擅长足球。When当……时；until直到；since自从；while当……时，与……同时。所以选D。