Đáp án:

23. B
24. D
25. B
26. A
27. D

26. What is the right amount of sleep for a 14-year-old?
A.8 hours
B.9 hours
C. 11 hours
D.12 hours

Giải thích:

14-year-old → Between the ages of 13 and 19, our brains and bodies change a lot. Sleep helps those changes to happen, so teenagers need more sleep than 12-year-olds. Teens sometimes sleep for 11 or 12 hours on the weekend, but scientists say about nine hours is the correct amount
27. According to the article, how much sleep does the average teenager get during the week?
A. 5 hours
B. 6 hours
C. 7 hours
D. 7 or 8 hours

Giải thích: 

teenagers cannot normally go to sleep before 11 p.m. because of the changes in their bodies. In most countries, they then have to get up most of the year at 6.00 or 7.00 to be in time for school. 

28. In the second paragraph, they means
A. all schools
B. high schools
C. teenagers
D. countries

Giải thích:

It would be better if high schools in countries around the world started at 11.00 or 12.00, but they do not, so parents must find other ways to make sure their teenagers get enough sleep.

29. What does this mean in the third paragraph?
A. Sleeping for half an hour
B. Half an hour
C. Home
D. Sleeping after dinner

Giải thích:

teenagers could sleep for half an hour as soon as they get home or after dinner. This is better than letting them sleep late on the weekend.
30. What happens to teenagers if they use an electronic device late in the evening?
A. They spend too long on social media.
B. They play games late into the night.
C. They don't want to turn the device off.
D. The screen light stops the body getting ready for sleep.
Giải thích:
Secondly, teenagers should not use laptops or cell phones late in the evening for games or social media. The light from these devices makes it harder for the body to feel tired.

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