BY LEDUYHUNG DXBP E8 U7 MINI TEST 1

People in my neighbourhood are doing a lot to save ......

• endangered species

• ecosystem

• habitat

Con Dao National Park provides a rich .............. for marine life.

• habitat

• ecosystem

• endangered species

Forests help release oxygen and absorb .................... ; they also provide homes for many species.

• carbon dioxide

• ecosystem

• habitat

.................. is a serious environmental concern as it harms natural habitats.

• Cutting down trees

• Habitat

• Ecosystem

An .............. maybe a whole forest, or a small pond, and it can be of any size.

• ecosystem

• habitat

• carbon dioxide

You must be careful ................ you cross the street.

• when

• after

• before

I'll wait for you here .............. you get back.

• until

• when

• after

Make sure you lock the door ............... you go out.

• when

• until

• because

You must get a permit ............... you build a campfire at a national park.

• before

• after

• when

Don’t use too much water ................. you are having a shower.

• while

• unitl

• after