-The mid-exam is coming. I have some trouble with my lessons. ---Don’t worry. I think I

问题补充：

---The mid-exam is coming. I have some trouble with my lessons.

---Don’t worry. I think I can give you some suggestions .

A. value

B. valuable

C. of valuable

D. of value

答案：

A. value

B. valuable

C. of valuable

(答案→)D. of value

解析：

试题分析: 句意：期中考试要到了。我的功课有一些困难。别担心，我想我能给你一些有用的建议。be + of + 抽象名词 = 形容词，故选D。