1 . Junk food is ________ to your health. You’d better not have it.

2 . 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

3 . Volunteers bring us warmth and help. So we should ________ them.

A．be responsible for

B．be harmful to

C．be thankful to

D．be thirsty for

4 . —Do you know that polluted air is very ________（harm）to people’s health?
—Yes, we should wear masks.

5 . It is ________ (harm) to your health to drink too much wine.

6 . Eating too much candy is ________ (harm) to our teeth.