The problem is due to discipline, or, more precisely, the lack of discipline, in school.
Giải thích: precisely (adv): chính xác
informally (adv): thân mật flexibly (adv): linh hoạt
casually (adv): tình cờ wrongly (adv): sai
=> wrongly >< precisely
Tạm dịch: Vấn đề này là do nội quy, hoặc chính xác hơn, là do thiếu nội quy ở trường học.
Đáp án: D
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More people are now employed in service industries than in manufacturing.
The government is being widely criticized in the media for falling to limit air pollution.
The council has spent an enormous amount of money on this project.
We have to employ extra staff to deal with the increased workload.
If we use robots instead of humans, many people may be out of work.
The palace was badly damaged by fire, but was eventually restored to its original splendor.
After the marriage, Ruth decided to settle permanently in New York.
Despite having a bigger and cheaper choice of healthy foods, many Americans have lost a lot of weight.
He found the course difficult so he had to spend most of his time on study.
That is a well-behaved boy whose behaviour has nothing to complain about.