— I have great _­­ in learning math and Im so worried. Could you help me?— Sure.

问题补充：

— I have great _­­ in learning math and Im so worried. Could you help me?

— Sure. Id be glad to.

A. trouble B. interest C. fun

答案：

解析：此题考查固定结构have trouble in doing sth表示做某事有困难或麻烦。