II.
 Choose the word in each group that has the underlined part pronounced differently from the rest:
1.  a. referee b. see c. goalkeeper d. cheer
2.  a. garbage b. mass c. trash d. flat
3.  a. popular b. population c. forest d. melody
4.  a. flow b. row c. know d. now
III. Circle the correct answer.
1. We have to get the pipes checked by a ………………………………….
a. mechanic b. plumber c. piper d. engineer
2. Don’t forget to turn ……………the lights when you leave the  classroom.
a. on b. out c. off d. up
3. Lighting ………………for 10 to 15 percent of our electricity bill.
a. accounts b. makes c. puts d. does
4. Buy this kinds of energy -….bulb and you won’t spend much money on electricity.
a. using b. saving c. producing d. consuming
5. Mrs Quyen bought corn , potatoes……………cabbages at the market. 
a. and b. or c. so d. because
6. If the rice paddies are polluted, the rice plants ……………..
a. would die b. could die c. will die d. died
7. Hanh can’t go to the movies with us tonight because she has to .......…… her sister.
a. look for b. look after c. look at d. look out
8. Using …………….transport is a good way to reduce traffic jams and air pollution.
a. common b. private c. public d. train
IV. Use the appropriate forms of the verbs in brackets:
1. If the weather is good next weekend, we (go) .............will go............. away somewhere.
2. Come on! If we (hurry) ............hurry............ , we (catch) ...........can catch............... the bus.
3. If there (be) .....is...... too much litter on the streets, the environment will become polluted.
4. If the sea level (rise) ..........rises .........., there will be floods in many parts of the world.