Giải
11 . Bad students never (work) works hard 

12 . What time your son (get up) ..does/get up............. every morning ?

13 . I (be) ...am........ a nurse , but my sister (be) ..is...... a doctor

14 . Your parents (go) ..Are / go................. to work  at eight o'clock ?

15 . Nam (wash) .washes...... his face at six fifteen

16 . We (not have) .don't have.. breakfast at secen thirty every morning 

17 . Does your brother wash his face ? 

18 . What is the children do (do) in the yard ? 

19 . Where is Mr Minh work ?

20 . How your father (travel) travels to work ? 

21 . Hoa doesn't drive ( not drive) a car 

17 . Does your brother wash his face ? 

18 . What the children do in the yard ? 

19 . Where is Mr Minh working ?

20 . How your father travel to work ? 

21 . Hoa doesn't drive a car 

 11.  bad students never .....work...hard

12 . What time your son (get up) ......does your son get up......... every morning ?

13 . I (be) ...am..... a nurse , but my sister (be) ...is.... a doctor

14 . Your parents (go) ....Do your parents go.... to work  at eight o'clock ?

15 . Nam (wash) ...washes.... his face at six fifteen

16 . We (not have) ..don't have . breakfast at secen thirty every morning 

17 . your brother wash his face ? 

18 . the children (do) in the yard ? Do the children do in the yard

19 . Where is Mr Minh (work) ? Work

20 . How your father (travel) to work ? How does your father travel to work

21 . Hoa ( not drive) a car     Hoá doesn't drive a car