Correct form ( dạng đúng của động từ) 

 1. Would you like (have)... a picnic today?

 2.How often did Lan (write) ...a letter to her penpal?

 3. (cook)........ meals makes her happy. 

4.Did your parents enjoy (play).... Volleybal after work? 

5. Will Mr Nam (organize)...... a party tomorrow? 

6.Don't ( stay)....up late at night? 

7.Listen! Someone (play)........the piano now? 

8. You look pale (nhợt nhạt). You ought to (go).......to sleep now. 

9.We (play).............soccer last Saturday. 

10. Lan used to cread) ...............comic books when she was five.

3-5(2x+1)=x-7(2-4x)