b/

1. Mountainous

2. collection

3. parking

4. entrance

5. interesting

6. collector

7. enjoyable

8. beautifully

B/

1. (Bạn xem lại đề)

They couldn't help you because they were not here.

They were not here, so they couldn't help you.

2. I can't go out because it's raining.

It's raining, so I can't go out.

3. Because we haven't got any food, we are going shopping

We haven't got any food, so we are going shopping.

4. Because there was fog, their flight was delayed.

There was fog, so their flight was delayed.

5. Because the film was boring, we decided to go home

The film was boring, so we decided to go home.

6. Because I couldn't do this exercise, I asked Tom for help.

I couldn't do this exercise, so I asked Tom for help.

=>
b/
1. mountainous
2. collection
3. parking
4. entrance
5. interesting
6. collector
7. enjoyable
8. beautifully
B/
1. They could not help you because they were not here.
They were not here so they could not help you.
2. I can't go out because it's raining.
It's raining so I can't go out.
3. We haven't got any food so we are going shopping.
We are going shopping because we haven't got any food.
4. There was fog so their flight was delayed.
Their flight was delayed because there was fog.
5. The film was boring so we decided to go home.
We decided to go home because the film was boring.
6. I couldn't do this exercise so I asked Tom for help.
I asked Tom for help because I couldn't do this exercise.