III. Choose the best answer to fill in the blank.
13. Don’t drink that water. It’s ________.
A. contaminated B. damaged C. dumped D. cleaned
14. By the time we got to the cinema, the film ________.
A. start B. had started C. starting D. started
15. The team’s success was largely ________ to her efforts.
A. since B. due C. because D. lead
16. Eating too much sugar can ________ to health problems.
A. make B. lead C. cause D. due
17. I often drink coffee, but today I ________ tea.
A. drank B. am drinking C. drink D. was drinking
18. The old tradition of first-footing is still practiced today in ________.
A. Scots B. Scottish C. Scotland D. Scotlanders
19. The Maori in New Zealand greet each other by ________ their noses.
A. punching B. blowing C. touching D. kissing
20. There is a red maple leaf on the ________ of Canada.
A. banner B. flag C. money D. badge
21. If you ________ the president, what would you do to help the environment?
A. are B. were C. had been D. will be
22. The heavy rain has caused ________ in many parts of the country.
A. floods B. drought C. storms D. snow
23. Scientist have come up ________ new ways of saving energy.
A. for B. along C. to D. with
24. Waste water from many factories which is dumped ________ water bodies directly causewater pollution.
A. into B. up C. to D. out
25. Americans throw ________ twenty-eight and a half million tons of plastic in landfillsevery year.
A. down B. about C. out D. away
bang -230 nhe
cho tam giác ABC có \(\widehat{A}< 90\) độ, M là trung điểm BC. Vẽ các tam giác vuông cân tại A là BAD và CAE ( C, D thuộc nửa mặt phẳng bờ AB; B, E thuộc nửa mặt phẳng bờ AC). Gọi I là điểm thuộc tia đối tia MA sao cho MA=MI.
a) CMR: EB=DC
b) CMR: CI//AB
c) CMR: \(AM\perp DE\)
d) Gọi H, K lần lượt là trung điểm EC, BD. CMR: tam giác MHK vuông cân