单项选择题

A．Go to the library.
B．Get some exercise.
C．Go to see a film.
D．Do homework in school.
<上一题 目录 下一题>
热门 试题

填空题
discussions
单项选择题
In the United States, the only pollutant for which there is a national air quality standard is lead.
A．Y
B．N
C．NG
相关试题