一道英语选择题 到底是不是考虚拟? 有把握的来
问题描述：
一道英语选择题 到底是不是考虚拟? 有把握的来
The law requires all the cars ______ for safety and efficiency.
A. being tested regularly B.to be regularly tested C. be regularly tested D.regularly tested
到底是B 还是C,有把握再回答
晕了 还是不统一唉。。。
答
C
虚拟