1. A

2. B

3. C

4. C

C7 :

1. Because they are not just practical but very fashionable as well. ( They are popular almost everywhere and with everybody because they are not just practical but very fashionable as well )

2. The gold miners bought canvas, a heavy fabric used for tents. ( He caine to sell canvas, a heavy fabric used for tents, to gold miners )

3. No, it doesn't. ( The word "jeans" come from the word " Genoa" )

4. In the United States ( Mr Stauss made the first jeans in the United States )

C8 :

1. A

2. B

3. A

4. D 

C9 :
1. Vinfast Automobile Company was found by billionaire Pham Nhat Vuong in 20.1.7.

2. My brother said that he was worming for an liaternational bank in Hanoi then.

3. Unless you follow the guidlines from The Ministry of Health, you may be affected by Covid - 19.

4. We haven't met Nguyen Quang Hai football player for two months.

5. No one in my class is more intelligent than Jenifer.

6. Because of being lazy, my sister failed the exam.

Câu 1: Vinfast Automobile Company was found by Billionaire Pham Nhat Vuong in 20.1.17
Câu 2: My brother said that he was working for an international bank in Hanoi now
Câu 3: Unless you follow the guidelines from the Ministry of Health, you may be affected by the Covid-19
Câu 4: We haven't meet Nguyen Quang Hai football player for two month
Câu 5: No one in my class is more intelligent as Jennifer 
Câu 6: Because of her laziness, my sister failed the exam

Mình không chắc đúng hết đâu nhé ;v;