Turn from ACTIVE into PASSIVE:
21.He has to pay the bill. ........................................................
22.For the time being, Alice is teaching that group. ........................................................
23. She has finished the report. ........................................................
24.The police have arrested five suspects. ........................................................
25.The mad dog bit the little boy.
26.The teacher corrects our exercises. ........................................................
27.Mr. Smith saw the accident. ........................................................
28.They started a dancing class last week. ........................................................
29.You should insure the package. ........................................................
30.He may pay the bill for us. ........................................................
31.You ought to water the plants once a week. ........................................................
32.The mailman is delivering the mail now. ........................................................
33.Somebody has taken my briefcase. ........................................................
34.The doctor ordered him to take a long rest. ........................................................
35.Lightning struck the house. ........................................................
36. When will you do the work? ........................................................
37 How are you going to deal with this problem? ........................................................
38. How do you spend this amount of money? ........................................................
39. I wonder whether the board of directors will choose Susan or Jane for the position. ........................................................
40. How did the police find the lost man? ........................................................