4.We are tired of (working )…………..……… for low salary.

5. This is the second time you (break)…have broken ………..…a cup.

6. (you/do) ……have you done ……………..… the homework yet?

7. Mai is in her room. She (play)………is playing ………..…… the guitar.

8. The teacher said that we should ( not make ) …not make ………… noise in class.

9. Water …covers………………( cover) most of the Earth’s surface.

10. The gate …………is locked…….…...( lock) at 6.30 p.m everyday.