1 . 吸烟不仅有害健康，而且污染环境。
________________________________________

2 . Smoking is ______ (harm) to your body.

3 . —I’m afraid e-books might ________ us, especially our eyes.
—Hmm. But they will be useful for us as long as we put them to good use.

A．be good for

B．be friendly to

C．be harmful to

D．be helpful to

4 . Smoking is ________ (harm) to us.

5 . Eating too much junk food is ________ to our bodies. (harm)

6 . 吸烟有害健康。（汉译英）
__________________________________________.

7 . It is ________ to your teeth to eat so much sweet food. (harm)

8 . Candies are ________ (有害的) to children’s teeth.

9 . 众所周知，污染对我们的健康有害。
As we know, pollution is ________ ________ our health.

10 . 化学制品对环境有害。
Chemicals are ___________ ___________ the environment.