21.Susan’s parents have bought a large house with a swimming pool. It __must____ be very expensive.
22.The meeting will be held in half an hour, but they haven’t got everything ready __yet_____.
23.-Why were you late for the meeting this morning?
-I __lost___ my way, so I __missed___ the first bus.
24. The shop doesn’t open this morning.
25. Is she closing the door?
26.-There is somebody at the door, who __may___it be? Is it the milkman?
-No. It _can’t____ be him. It’s just four o’clock. It’s too early.
27.The news that they failed their driving test discouraged him.___didn’t it_____?
28.They’re not very good but we like _to play basketball with them anyway_______.
29. Wednesday is the fourth day of a week.
30. There are 7 days in a week.
31. You’d better _not be _____ late next time.
32. Look, Lily is on__ the fifth__ track!
33. I didn’t go shopping yesterday. He didn’t _either_.
34. He cleaned the glasses carefully for fear that it _should be damaged ___.
35. She is such an irritating woman, I don’t know how you can ___put up with___ her.