1.Hoa is not young enough to cook by herself.

2.It is very dangerous to play in the kitchen.

3.He spends two hours to do his homework every night.

4.John said that he didn't know how to do this exercise.

5.Her grandmother used to live on a farm when she was young.

6.He has begun teaching in that school since 2010.

1.Hoa is not young enough to cook by herself.

2.It is very dangerous to play in the kitchen.

3.He spends two hours to do his homework every night.

4.John said that he didn't know how to do this exercise.

5.Her grandmother used to live on a farm when she was young.

6.He has begun teaching in that school since 2010.

               cho mik 5sao nhé1