13. My little brother __ walk when he was one year old. A. can B. might C. could 14. Going by bus __ a good way to save energy. D. ought to A. is B. would be C. are D. were 15. Mr. Taylor has decided to __ the amount of gas by replacing the gas stove with an electric cooker. A. cut down on B. come down on C. go down with D. look down on 16. My brother works in one of __ biggest factories in the city. A. the B. a C. an D. no article 17. The bus will collect us in front of the school gate __ 6.30 tomorrow morning. A. on B. from C. at D. of 18. It is quite __ that my water bill is much higher this month than last month. A. surprising B. surprised C. surprise D. surprises 19. Myson is the little boy wearing a __ T-shirt. A. blue new nice B. blue nice new C. nice new blue D. new nice blue 20. Coal and gas are major sources of pollution. __ ,wenced to find alternative sources of energy such as wind, solar and nuclear power. A. Therefore B. However C. Because D. But 21. Lara __ the entrance exams to high school after she completes these courses. A. took B. take C. takes D. will take 22.Saturn's __ rings can be seen from Earth with a telescope. A. beautiful B. beautifully C. beauty D. beautify 23. The farmers are __ a break after four hours of working hard in the field. A. giving B. having C. doing D. getting 24. Nowadays, most people prefer cars with lower __ consumption. A. fuel B. water C. bill D. nuclear