1 . We should do what we can do to reduce pollution because it is ________ (有害的) to the earth.

2 . I heard this kind of medicine is ________（有害的）to people. You’d better not take it.

3 . Eating too many sweets is _________( harm) to your teeth, kids.

4 . Plastic is ________ to the environment, so don’t throw it everywhere.

5 . 空气污染对我们的健康有害。
Air pollution _________________________ our health.

6 . 据说被污染的空气对我们的健康有害。
________________________

7 . —Tom, playing games on the phone ________ your eyes and study.
—I see. Thank you. I will do more sports instead.

A．is good for

B．is harmful to

C．is sorry for

D．is strict with

8 . Plastic is h________ to the environment, so don’t throw it everywhere.

9 . It is known to all that air pollution is ________ (harm) to our health.

10 . I heard this kind of medicine is ________ to people. You’d better not take it. (harm)