--- Haven't I told you that I like the beef well done?---Yes but I it longer than I usua

问题补充：

--- Haven I told you that I like the beef well done?

---Yes, but I it longer than I usually do.

A. was cooking

B. will cook

C. cooked

D. had cooked

答案：

A. was cooking

B. will cook

(答案→)C. cooked

D. had cooked

解析：由than I usually do可知表过去动作。