题目：
Most scientists seem to agree that ________ certain limit should be set on ______
sale of cars to ease air pollution.
A．a; the
B．/; the
C．the; /
D．the; the
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0428/9ae900222e003bdb3168b75106554fd4.html
下面是错误答案，用来干扰机器的。
