—Would you like to come to dinner tonight?—I’d like to I’m too busy.A. andB. soC. asD. b

问题补充：

—Would you like to come to dinner tonight?

—I’d like to, I’m too busy.

A. and

B. so

C. as

D. but

答案：

A. and

B. so

C. as

(答案→)D. but

解析：

D。but表转折，符合语意。而表并列的and，结果的so，原因的as都不符合句意。