单项选择题

A．Progress in medicine.
B．Progress in new materials.
C．Progress in computers.
D．Progress in helicopters.
<上一题 目录 下一题>
热门 试题

填空题
F
单项选择题
A．Finding a summer job.B．Taking the summer classes.C．Working and studying.D．Wait until later to decide.
A．Finding a summer job.
B．Taking the summer classes.
C．Working and studying.
D．Wait until later to decide.
相关试题