Na was extremely pleased which she got an A for her assignment.

--> Na was extremely pleased because / since  she got an A for her assignment.

1.You can see a church at the top of the hill

- A church can be seen from the top of the hill.

(Passive voice)

It's not the teacher. It's YOU. If you're good, you can learn from anybody. To answer your question: the best teachers are your friends...in my opinion.

1.  Please don't make noise in class.

→ Would you mind not making noise in class?

2. "Do many tourists visit Ha Long Bay every year, Long?" Lan asked

→ Lan asked Long if many tourists visited Ha Long Bay every year.

3. In the middle of our meal, the phone rang.

→ While we were in the middle of our meal, the phone rang.

4. This is the first time I have been to Ha Long Bay.

→ I have never been to Ha Long Bay before.

5. Nobody has used these rooms for ages.

→ These rooms haven’t been used for ages.

Choose the correct answer A,B,C or D to complete the sentences:
1. Do you mind ...... in here? peaking is not allowed in the library.
A. no talking            B. not talking           C. not talk          D. not to talk
2. My parents are never pleased with my grades ..... I get nothing less than a "B".
A. even though         B. despite               C. because        D. because of
3. We've decided to go on a vacation ....... all the financial problems we are going through.
A. although               B. since            C. in spite of        D. however
4. He has received several scholarships ......... his academic and artistic ability.
A. though                  B. because of           C. despite         D. for
5. I hope ...... in time for my trip to Australia next month.
A. recover           B. recovering      C. to recover      D. to be recovered 
6. I always put off ......... my homework until the last possible moment.
A. doing                     B. to do               C. do               D. in doing
7. ........ riding a bicycle is a good leg exercise, it does not use up a lot of calories.
A. As                   B. Because            C. If                 D. Although
8. I expect to get high marks in this exam ........ I put in a lot of work for it.
A. even though        B. whereas           C. so that           D. because
9. ......... working for the company for six months now, he never seems to know what to do.
A. Since                  B. Although              C. Despite          D. Because of
10. Are you going to make your daughter ........ part time in the store this summer?
A. work                   B. to work               C. working           D. worked
11. ....... he had read the instructions several times, he knew what to do.
A. Whereas             B. Until                  C. After                 D. Although
12. Patricia encouraged me .......... to Stanford, and I got in.
A. applying              B. to apply            C. apply                 D. applied
13. I feel like ........... to the movies this evening - want to come?
A. go                          B. to go               C. to going            D. going    
14. Our company is surviving ......... the fact that the economy has gone into recession.
A. although             B. because of        C. despite          D. whereas
15. It's no use ......... on the telephone. The line is always busy.
A. try to call        B. trying calling      C. to try calling     D. trying to call