Question

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

Answer 1

A

这题考察冠词的用法：第一空不填，因为nature是抽象名词。第二空a，指“一个清洁的环境”，选A。