问题补充:
--- People should spare no efforts to protect the environment.
--- . Air pollution does harm to our health.
A. All right
B. Take it easy
C. Go ahead
D. Exactly
答案:
A. All right
B. Take it easy
C. Go ahead
(答案→)D. Exactly
解析:考查交际用语:A. All right好啊,行啊,B. Take it easy放轻松,C. Go ahead请便,D. Exactly 确实,句意:--人们应该不遗余力的保护自然,--确实,空气污染对健康有害。选D。