—Have a cup of coffee?— though as a rule I don’t drink after dinner.A. If you insist　B.

问题补充：

—Have a cup of coffee?

—,though as a rule I don’t drink after dinner.

A. If you insist

B. Don’t you insist

C. Once you insist

D. What I insist

答案：

(答案→)A. If you insist

B. Don’t you insist

C. Once you insist

D. What I insist

解析：本答语包含两个状语从句，而主句承接上文被省略了，意思是“如果你坚持要我喝，那么我就喝杯咖啡，尽管一般来说我不喝”。因此用A项作答，B项错在它与though从句语意不连贯。