The vegetables didn’t taste good. They too long.A. had cookedB. cookedC. had been cookedD

问题补充：

The vegetables didn’t taste good. They too long.

A. had cooked

B. cooked

C. had been cooked

D. were cooked

答案：

A. had cooked

B. cooked

(答案→)C. had been cooked

D. were cooked

解析：考查时态及语态。句意：这些蔬菜唱起来不怎么样。他们被煮的太久了。可知本句描述的是过去某个时间前以完成的动作，故用过去完成时态，蔬菜是cook的动作对象，故用被动语态，选C。