单项选择题

A．polluted
B．ideal
C．healthy
D．changing
<上一题 目录 下一题>
热门 试题

单项选择题
A．overB．onC．atD．of
A．over
B．on
C．at
D．of
单项选择题
A．half a year.B．half a circle.C．a bicycle.D．quarter of a circle.
A．half a year.
B．half a circle.
C．a bicycle.
D．quarter of a circle.
相关试题