10. The boy was ____ to speak louder in the class when answering the teacher's questions.

A. a coward enough  

B. enough of coward

C. too much the coward  

D. too much of a coward

该题只能选 D。先不说句意是否允许，其余3个表达都是不存在的。答案D还可省去 of。

英语中有 He is man enough. He is fool enough. 的说法，名词前不带冠词，这是比较固定的搭配。这里，man 和 fool 其实用作形容词了。