4. Make a noun + noun compound using two of the words. You may have to change a word from plural to singular.
a. the same temperature as there is in the room
b. fumes which come from exhausts
c. salts which come from minerals
d. chemicals present in food
e. generations which will exist in the future
f. disease suffered by the heart
g. a solution of salt
h. pollution carried in the air
i. change in the climate
g. a bill you receive for your use of electricity

5. Complete each sentence with the, a / an or zero article.
a. Last week at school we learned how to make __barometer.
b. This is ____cardboard which we used to make our barometer.
c. And this is___ bottle we used. We attached the cardboard to it.
d. We made_____ measuring scale and attached it to the side of thebottle.
e This is ____ bowl we also used as part of our barometer.
6. Complete the sentence with a suitable preposition.
a. The uvula is a small piece of flesh that hangs down ___ the back of your throat.
b. The island of Alcatraz is___ the middle of San Francisco Bay.
c. Write your address ____the top of the letter on the right-hand side.
d. It was hard to watch the match because there were several tall people standing __ front of me.
e. ___the end of the play, the whole audience burst into applause.
f. The man was completely bald ____the top of his head.
g. Anna felt tired, so she stopped the car ___the side of the road and got out.
h. Divers cannot work ___ the bottom of the sea for very long.