1 this bike can be fixed
2 the homework should have been finished .
3 the cake must be eaten upin three hours.
4 this essay can be seen on the internet.
5 this book can be bought in the bookstore.
6 the menu must be paid off before going out the restaurant.
7 the thief must be sent to the police sation.
8 the socks should have been washed.
9 the room should have been put in order.
10 the ticket should have been booked.
11 this text must be recited in five minutes.
12 the clothes can be washed in three days.