单选题
According to this passage, one early step in any effort to improve the environment would be to______.
A、
return to the exclusive use of natural fertilizers
B、
ban the use of automobiles in and around cities
C、
study successful effort in other countries
D、
set up a timetable for corrective actions
【正确答案】
D
【答案解析】
文章最后说“目前我们已经试图做了点工作——我们一开始应该草拟一份首先要做的事情。”因而与[D]相符。
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