—Do you like ball games? —Yes. They are very fun.A. easyB. muchC. interestingD. useful

问题补充：

—Do you like ball games?

—Yes. They are very fun.

A. easy

B. much

C. interesting

D. useful

答案：

A. easy

B. much

(答案→)C. interesting

D. useful

解析：

试题分析: 句意：你喜欢球类运动吗？是的，他们很有意思。easy容易的，much很多的，interesting有趣的，useful有用的。fun有趣的，与interesting有趣的意思相同，故选C