Everywhere man has cut down forests in order to grow crops or to use wood as fuel or a

问题补充：

Everywhere man has cut down forests in order to grow crops, or to use wood as fuel or as building material.

A. the; the

B. the; 不填

C. 不填; the

D. 不填; 不填

答案：

A. the; the

B. the; 不填

(答案→)C. 不填; the

D. 不填; 不填

解析：第一空不填冠词，因为此处的forests为泛指; 第二空填定冠词，特指来自被砍伐森林的木材。