The ___ climate has become warmer.

Lots of ___ are poured into the river.

Yoo much waste gas is ___ ___.

global climate

A. 全球气候
B. 全球经济

give off

A. 散发
B. 给与

use up

A. 使用
B. 用完

cut down

A. 剪短
B. 砍掉，减少

it happened that

A. 似乎
B. 碰巧

I hear there is Sandstorm in Beijing.

A. That is terrible.
B. I don'tknow.

loudspeaker

A. 大声说
B. 扩音器