Bài 1:

1.and         2.so         3.however         4.therefore           5.so           6.but           7. because         8.however                9.because              10.or

bài 2:

2.the grasses should be cut around the house

3.we have learnt English for 4 years

4.I suggest using gas instead of burning coal

5.because Tom was lazzy,he failed the exam

6.if we dont't reduce the use of water and electricity,we'll have to pay more this month 

7.hoa can't cook as well as lan does 

8.Nam washed his motorbike carefully

9.My sister is so good to pass  final the exam

10.It's difficult making friends in the new school

Bài 1:

1.and         

2.so         

3.however         

4.therefore           

5.so           

6.but           

7. because         

8.however               

9.because             

10.or

bài 2:

2.the grasses should be cut around the house

3.we have learnt English for 4 years

4.I suggest using gas instead of burning coal

5.because Tom was lazzy,he failed the exam

6.if we dont't reduce the use of water and electricity,we'll have to pay more this month 

7.hoa can't cook as well as lan does 

8.Nam washed his motorbike carefully

9.My sister is so good to pass  final the exam

10.It's difficult making friends in the new school