3) Hotel rooms must be .......... by noon.
4) At the end of the course special prizes were ......... to the winners.
5) If the plane had crashed it could .......... have killed hundreds of people.
6) After many years of testing, the medicine was released for general use ......… .
7) "I know it's late, so I shall not .......... you any longer," said the manager to his secretary.
8) You can go to the party .......... you are back home by half-past eleven.
9) How many litres of milk do you think this bottle will .......... ?