单项选择题

Pollutants introduced into a lake can rapidly accelerate its natural aging process.

A．change
B．speed up
C．turn around
D．destroy
<上一题 目录 下一题>
热门 试题

单项选择题
A brisk walk in cool weather is invigorating.
A．short
B．long
C．lively
D．solemn
单项选择题
Trees that block the view of the oncoming traffic should be cut down.
A．piece
B．obstruct
C．spoil
D．interfere
相关试题