1.Polly's watch was broken ______so____she borrowed mine.

2. My family went to Africa_____because______we wanted to study the wild animals.

3. Melissa tried to read the book ______although_____ she couldn't understand it

4. She isn't English____but_______she speaks English perfectly

5. They went to town ______to_____ bought a lot of clothes.

6. the road was under water____so_______the police closed it to traffic

7. The air is polluted____because_____there's too much traffic.

8. i haven't got a car______but______I've got a motorbike

9. Which color do you want- red, green, yellow,___or______ blue?

10. She's working late next Friday_____so______ she can't come to the party

and : và

but : nhưng

so : vì vậy, vậy nên

or : hoặc

because : bởi vì

therefore : cho nên

however : tuy nhiên

1, so

2, because

3, but

4, but 

7, because 

8, but

9, or

10, so