单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A. A new fuel for buses.
B. The causes of air pollution.
C. A way to improve fuel efficiency in buses.
D. Careers in environmental engineering.
<上一题 目录 下一题>
热门 试题

单项选择题
A. Two different types of bones in the human body.B. How bones help the body move.C. How bones continuously repair themselves.D. The chemical composition of human bones.
A. Two different types of bones in the human body.
B. How bones help the body move.
C. How bones continuously repair themselves.
D. The chemical composition of human bones.
单项选择题
A. 1:30.B. 11:00.C. 9:30.D. 10:00.
A. 1:30.
B. 11:00.
C. 9:30.
D. 10:00.
相关试题