1. I don not know everything about plumbing, so i did not fix the leak in the sink myself.

→ If....

2. Is Matthew going to enter the race? He'll probably win it.

→ If....

3. We should have bought that picture five years ago because it would be quite valuable now

→ If....

4.Carol did not answer the phone because she was studying.

→ If....

5.She is very thin , perhaps that is why she feels cold so much

→ If....

6.He never polishes his shoes , so he never looks smart

→ If....

1. I am sorry i disturbed you. I did not know you were busy

→ If....

2. It might rain. if it does, everyone can eat inside

→ If....

3. Margaret was not injured in the crash because she was wearing a seat belt.

→ If....

4. I have to work tomorrow evening, so i can not meet you

→ If....

1.Without this treatment, the patient would have died

→ If........

2. As she is often absent from class, she can not keep pace with her classmate.

→If.....

3.The wind is blowing hard, so i will not take the boat out for ride

→If......

environment

learn

I learn English so as to communicate with foreigners

Give the correct form of the word given to complete the sentences:

1. Bao always ...in his study(success)

2.Nobody likes him because he behaves....(bad)

3. There are ...starts in the sky. We can't count them.(count)

4. A lot of foreign..... like to study Uncle Ho's life.(history)

5. The police are interested in the sudden....of the valuable painting.(appear)

6.They left the house in a .....mess(fright)

I. Complete the sentences with the correct prepositions:

1. Could i help you.... your bag?

2.Na got up late this morning because her alarm clock didn't go...

3.I'm looking forward.... seeing you in June.

4.In the competition, everyone fell.....the deep and dangerous water.

5.My mother often picks me ....from the school.

6.I'm going to invite my friends to come over.... dinner tonight.

Students ought to prepare the lessons carefully before class.

→The lessons ....

1. Thinking ò making toys from used paper was his interesting idea.

→ It was interesting that ...

2. Her father asked her if she would go to the cinema with her friends.

→Her father asked her".....