6. I'm looking forward to seeing you at Christmas.

(be) looking forward to + Ving: mong chờ điều gì 

7. Nam is tired because he stayed up late watching TV last night.

Clause + because + clause: bởi vì 

8. Because Huyen made a beautiful cake for her father's birthday, he is very happy.

Because + clause, clause: bởi vì 

9. Unless we stop polluting the water, we will have no fresh water to use.

Unless: trừ khi = If .. .not 

if 1: If +HTĐ, S + will / can / shall + V1

10. What about using energy - saving bulbs?

Let's + V1

= What about / How about + Ving?

= Why don't we / you  +V1? 

--> đưa ra ý kiến, đề nghị 

`color{orange}{~MiaMB~}`

Đáp án `+` Giải thích các bước giải:

`6.` I'm looking forward to seeing you at Christmas.

`-` hope + to V: mong được làm gì

`-` look forward to + V-ing: mong đợi làm gì

`7.` Nam is tired because he stayed up late watching TV last night.

`-` __`(1)`____, so ___`(2)`____: _____, nên _______

`=` __`(2)`__ because ___`(1)`____: bởi vì

`8.` Because Huyen made a beautiful cake for her father's birthday, he is very happy.

`-` __`(1)`____, so ___`(2)`____: _____, nên _______

`=` Because ___`(1)`___, _____`(2)`____: Bởi vì ______, ______

`9.` Unless we stop polluting the water, we will have no fresh water to use.

`-` Câu điều kiện loại `1` (Có thể xảy ra ở hiện tại hoặc tương lai)

`+` If + S + V(s/es), S + will/can/may/.. + V

`-` If not `=` Unless

`10.` What about using energy-saving bulbs?

`-` Why don't + S + V + .. ?: Tại sao không (làm ...)

`=` What/How about + V-ing + ... ? Thế còn (làm việc này thì sao)

`-----------`

$\color{green}{\text{#NhatHuyThichChoiLiqi}}$

$\color{orange}{\text{Chúc bạn học tốt ạ :33}}$