1 . You’d better not smoke or drink. Smoking and drinking are habits which are _______ your health.

A．harmful to

B．good for

C．full of

D．good with

2 . The doctor advised my father to give up drinking. He said that too much drinking is ________ his health.

A．good for

B．harmful to

C．busy with

D．full of

3 . —I want to watch TV the whole day after the long journey.
—You shouldn’t watch TV too much. It’s very harmful ________ your eyes.

A．in

B．as

C．with

D．to

4 . I think smoking is harmful ________ our health.

A．for

B．to

C．with

D．at

5 . As a student, everyone should ________ his behavior. That’s very important for them to get success in the future.

A．be responsible for

B．be harmful to

C．be thirsty for

6 . We are ________ the outside of the world through the Internet.

A．connected to

B．harmful to

C．careful with

D．known as

7 . —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

8 . —Don’t lie in bed like that. It will ________ your eyes.
—Thank you. I won’t do it again.

A．be weak in

B．be suitable for

C．be harmful to

9 . Drinking alcohol (白酒) can be ________ your brains. So people in China aren’t allowed to drink it if they are under 18.

A．good at

B．strict in

C．harmful to

D．busy with

10 . Eating too much meat is harmful ________ your health.

A．for

B．to

C．at

D．about