1 . Do you know that drinking too much pure water is also ________ to our health?(harm)

2 . Too much time on computer is ________ ________ your eyes.
（长时间对着电脑对眼睛有害。）

3 . Smoking can be ________ (harm) to people’s health.

4 . 吸烟有害健康。
Smoking ________ ________ ________ your health.
Smoking ________ ________ ________ your health.

5 . —Which is much braver, the sun or the moon, Tom?
—Of course the moon. Because it isn’t _________ the dark.

A．harmful to

B．afraid of

C．sure about

D．thirsty for

6 . Spending too much time online _______ people’s health.

A．is harmful to

B．is good for

C．is bad to

D．do harm to

7 . Playing games does harm to eyes.(改为同义句)
Playing games ________ ________ ________ eyes.

8 . Drinking alcohol (白酒) can be ________ your brains. So people aren’t allowed to drink it if they are younger than 18.

A．good at

B．good with

C．harmful to

D．thirsty for

9 . Spending too much time online is ________ (有害的) to people’s health.

10 . 在太阳下读书对你的眼睛有害处。
It ______ ______ ______ your eyes to read in the sun.