he would join the Science Club the day after
his room is untidy, his mother is unhappy
started our work, she had explained everything clearly
I had enough money, I could buy this motorbike 

-> Dr Chau's result didn't make a new medicine development

1 C=>volunteers

2 D=>productions

3 D=>waste

4 D=>do

5 C=>to play

6 B=>too

7 B=>on going

I. 

1. A         2. D     3. C        4. B

II. 

5. A       6. C   7. B   8. A

1.B

2.D

chắc ko đấy

Learn by heart

Read a lot

Make a note a lot of new words

tham khảo

Now,most people are studing english which will help them to get more successful in their life.besides,some people study it due to their hobby. with exception, i am also studing it.
Firstly, English is the international language. all of people in over the world are absolutely paying attention to improving four skill.because when we want to make friend with each other, we can communicate and write for each other.for me, i can widen relations with people in many countries.
Studing english helps me communicate more with foreigner. when i travel or visit some of my close relative in foreign country, i will be more confident to chat with them or some people do business with foreign countries, they can understand enough to exchange information with each other.Especially,it is important for people who are about to study abroad.
Studing english will help me to work more effectively. because when i apply for a job, i will hand in ielts or toefl certificate for director.i think, this will help me get more easily successful.
In my opinion, english is a easy language to study.Mean of words is easy to remember. but now, i study english not well and try my best to learn it.
in the morning,i get up at 7am to learn by heart several new word and listen to bbc, cnn. Sometimes i also listen to english music. in the everning, i practise to write several essay and do some task in fast reading, meaning into word book.
But i feel that my listening and writing skill is not good. sometimes i still have some trouble in listening, i listen to english not clearly . for writing, i am often incorrect about my expression.
Hence,i promise that i will try to improve my all skill

his father had smoked cigarettes when he had been young

was bought two years ago by him

I had a computer, I would finish my work fast

1.Tom said his father had smoked cigarettes when he had been young.

2.This car was bought two years ago.

3.If I had a computer, I would finish my work fast.

have

have

dịch: Tôi phải nhận được quyết định của họ trước ngày hôm nay.

If the air is pure, we will be healthy

is celebrated in many countries

they were tired, they went to bed early

C - D - D - D - C - D -B