7. Tuan wants to reduce air pollution so he planted more trees last week.

Clause + so + clause: vì vậy 

8. Mrs. Minh wants to buy that smartphone. However, its memory is not so large. 

Clause + however + clause: tuy nhiên 

9. My sister asked me if I wanted to spend my holiday in an ethnic village in Sapa.

S + asked + O + if/whether + S+ V  (lùi thì) 

HTĐ ⇒ QKĐ

10. Isabella said that her sister was a singer and she earned a lot of money.

S + said + (that) + S+ V (lùi thì)

HTĐ ⇒ QKĐ

11. B-bot completed the bask more quickly than Robob.

S  +V + more + ADV + than + O : ss hơn 

12. People can't live on Mars because there is no air.

can't + V1: không thể 

1. What is the price of this tablet?

What is the price of + N ? hỏi giá tiền 

2. Octopus I climbs the stairs more slowly than Big Dog. 

S  +V + more + ADV + than + O : ss hơn 

3. She sings very well.

S + V + ADV

`color{orange}{~MiaMB~}`