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

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。