单选题
The author draws on Los Angeles to prove that the ALA ______.
A、
is right to assign an "F" to that area
B、
often bases its report on the past events
C、
has a good reason to stress smog risks
D、
has overstated smog problems
【正确答案】
D
【答案解析】
文中说到洛杉矶也已经大大净化了自己的行为。……近年来超标天数已减少到那时的75%。所以引用洛杉矶为例，目的是说明环境保护署夸大了烟雾问题。因此正确答案是D。
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