2.

1. 1.C           
2. 2. D                
3. 3. D                
4. 4. B                
5. 5. C

3.

1. how does Nam usually go to school?
2. what did your grandfather use to do in the West lake every afternoon?
3. where are there a lot of trucks and cars in the rush hour?
4. what did the student use to be taught about when they studied in secondary school?
5. how does Hung drive his car?
6. how far is it from Ha Noi to Hai Phong?

4.

1. 1.is
2.  2.is                            
3. 3. jam                       
4.  4.walked
5. 5.are
6.  6.use to                    
7.  7.from                      
8.  8.catches
9. 9.to
10. 10. am                       
11. 11.it                           
12.  12.station

Study well!