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I.
1) A Sửa "used to" thành "used for"
2) A Bỏ "has" vì hành động chuyển đến London đã xảy ra, ko còn tiếp diễn nữa
3) A Sửa "wise" thành "wisely"
II.
1) We have used the headphones for one year
2) It has started to rain heavily for yesterday
GOOD LUCK !!!

1/. Visitors must leave umbrellas and sticks in the cloakroom.
A cloakroom is used to keep visitos' umbrellas and sticks.
2/. Women can obtain great achievements this year.
Big achievements can be obtained by women this year.
3/. Someone may call off the picnic if it rains.
If it rains, the picnic may be posponed.
4/. Someone will fix our air conditioner before the hot weather comes.
We will have someone fix our air conditioner before the hot weather comes.
5/. You must keep medicine out of the reach of children.
Medicine must be kept out of the reach of children.
6/. I have never done a more difficult exercise than this before.
This is the most difficult exercise I have ever done.
7/. I'm sure it isn't necessary to show your passport.
You need not showing your passport.
8/. Smoking is not permitted in the museum.
You must not smoke in the museum.
9/. You are not allowed to park in here. It's against the rules.
You must not park in here.
10/. It is possible that she leave for the airport to see her younger brother. (modal verb)
She can leave for the airport to see her younger brother.
11/. English is more popular than any other foreign languege in the world
English is the most popular language in the world.

Đáp án B
Giải thích: Dựa vào câu: “Sometimes we have so many unnecessary things we do not use. Imagine that you are moving your house, what are the necessary items you may need to live, only several bags.”.
Dịch: Thỉnh thoảng chúng ta có nhiều thứ mà chúng ta chẳng dùng. Tưởng tượng bạn chuyển nhà, mấy thứ bạn cần là gì? Chỉ vài cái túi thôi.

Đáp án C
Giải thích: Dựa vào câu: “Nature gave us all necessary resources to live and prosper. Now it is in danger and needs our help.”.
Dịch: Nhiên nhiên ban tặng chúng ta tất cả tài nguyên cần thiết để sống và phát triển. Thiên nhiên đang gặp nguy hiểm và cần sự hỗ trợ của chúng ta.

1. He is allowed to use their parents's car
2. We were made to do the homework
3. I heard them talking so loudly in the next room
4. He has worked in this school since last month
5. It has been 2 months since he last had his hair cut
Đáp án: B