A. Choose the word or phrase (a, b, c or d) that best fits the blank space in each sentence. the
1. If there is a mechanical problem, we suggest the manufacturer directly.
a, contact b. to contact ontacting d. be contacted
2. no battery could store................. to turn over a car's engine.
d. more energy a. much energy b. energy enough c. enough makes d. would come
3. The cost of solar power needs................ before it on makes an impact on the energy market.
a. fall b. to fall c. falling d .to be fallen
4. Don't forget to bring my dictionary when you............back tomorrow
b. will come c. are coming a. come d would come
5. Study harder.................
a. if you will fail the exam b. and you will fail the exam c. unless you' will fail the exam d. or you will fail the exam
6. They have to clean the whole area before dark,.............?
d. haven't they a. do they b. don't they c. have they
7. My car isn't very reliable. It keeps ...........
a. break down b. on break down d. to break down c. on breaking down
8. If we............... less paper, we............ trees in the forest.
b. will use. can save d. use/ can save a. used/ will save c. can use/ save
9. There's always litter here. No one ever............
c. pick up d. pick it a. pick up it b. pick it up
10. 'Should I begin typing these letters?' 'I suggest ...............the bookkeeping first.'
a .you finished b. you to finish c. you finish d. you will finish