1.  Who lost this umbrella yesterday?

     What did he lose yesterday?

     When did he lose his umbrella?

2.  Who is doing homework?

     What are you doing?

     When are you doing your homework?

3.  Who left the door open last night?

     What did they leave open last night?

     When did they leave the door open?

4.  Who were eating dinner at this time yesterday?

     What were you eating at this time yesterday?

     When were you eating dinner?

5.  Who will buy a new english dictionary the next day?

     What will she buy the next day?

     When will she buy a new english dictionary?

6.  Who went to the school by bus?

     What did the children go to school?

     When did the children go to school by bus?

7.  Who is going history at university?

     What is Ann's brother going?

     When is Ann's brother going history at university?

8.  Who will visit grandparents tomorrow?

     What will mr. Nam visit tomorrow?

     When will mr.Nam visit his grandparents?

9.  Who usually play football at this stadium?

     What do they play at this stadium?

     When do they play football at this stadium?

10.Who was working in a bank?

     What was your father working in a bank?

     When was your father working in a bank?

11.Who does often help Tom with his homework?

     What does Tom's mother often help Tom with?

     When does Tom's mother often help Tom with his homework?

12.Who did homework very quickly yesterday?

     What did Angela do very quickly yesterday?

     When did Angela do her homework very quickly?

Và cuối cùng là chúc bạn học tốt. Rất hân hạnh được giúp bạn! (Tự nhiên mình cảm thấy mình thật là siêng!!!)