问题补充:
Some people argue using nature to meet our own needs may spell disaster, unless we start to look around and understand how clean environment benefits us all.
A. /; a
B. the; the
C. the; a
D. a; a
答案:
(答案→)A. /; a
B. the; the
C. the; a
D. a; a
解析:考查冠词;第一空不填,nature是抽象名词,第二空填a,指一个清洁的环境,句意是:有些人认为利用自然来满足我们的需求可能会带来灾难,除非我们开始环顾四周,理解一个清洁的环境怎么使我们所有人的受益。