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1. The Smiths have tidied the house for Easter.
 The house________has been tidied by the Smiths for Easter______________________
2. The last time he met her was in 2015.
 He hasn't____________met her since 2015_____________________
3. When did you have it?
How long _________have you had it?__________________ 
4. We haven't seen him for three weeks. 
The last ___________time we saw him was 3 weeks ago_______________________ 
5. He is fond of learning English.
 He enjoys___learning English______________________
6. It’s a long time since we last contact with each other
 We haven't ________contact with each other for a long time______________________ 
7. Read many books or you will know more about the world. 
 If ____you don't read many books, you will know more about the world______________
8. You can't send her a letter if you don't know her address. 
 Unless ______you know her address, you can't send her a letter__________________     
9. The exam question was so easy that we all got it right. 
 It was _____such an easy exam question that we all got it right_____________     
10. Although Russia is one of the largest producers of oil, it still imports petrol.
 Despite ______being one of the largest producers of oil, Russia still imports petrol___      
11. Since you haven't finished your homework, you can't come with them. 
 If ___you had finished your homework, you cound come with them

1. I like getting a coffee or tea and studying at the café because being in a new environment helps me concentrate
2. Shopping isn't a hobby for me as it's just something I have to do
3. I'm not a morning person, but I can make myself get up early if necessary
4. On days with lighter work, I often have a few hours free
5. I sleep in often pretty late on the weekend
6. I take my time with my morning routine and eat a heartier breakfast

a. Số học sinh đạt giải nhì chiếm

       80% . \(\dfrac{1}{2}\)= \(\dfrac{2}{5}\) (số học sinh cả đoàn)

Số học sinh đạt giải ba chiếm

  \( 1 - \dfrac{1}{2} - \dfrac{2}{5} = \dfrac{1}{10}\)(số học sinh cả đoàn)
Số học sinh cả đoàn là \(5: \dfrac{1}{10} = 50\) (học sinh)

b. Số học sinh đạt giải nhất là: 50 . 1/2 = 25 (học sinh)
Tỉ số phần trăm số học sinh đạt giải nhất so với tổng số học sinh đi thi là

          25 : 50 . 100% = 50%

Số học sinh đạt giải nhì là : 25 . 80% = 20 (học sinh)

Tỉ số phần trăm số học sinh đạt giải nhì so với tổng số học sinh đi thi là:

        20 : 50 . 100% = 40%

Tỉ số phần trăm số học sinh đạt giải ba so với tổng số học sinh đi thi là

    100% - 40% - 50% = 10%

Đổi 12.6 km/h = 3.5 m/s

Công suất của con ngựa là

P = F.v = 450.3,5 = 1575 (W)

1 official

2 inventions

3 endless

4 entertainment

5 legendary

6 flight

7 native

8 official

9 different

10 wonderful

1. cooks well

2. play tennis skillfully

3. teaches well

4. dive well

5. drive carefully

6. is a good English teacher

7. is a fluent French speaker

8. am a safe cycler

9. are their teacher's quiet listeners

10. is a good actor

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