11. All of us must leep early and get ( ) early.
12. We can't walk on the sand ( ) shose.
13. Mrs. Kwan cut the cake ( ) a knife.
14. Hurry ( )! We don't have any time.
15.Will you go to Singapore ( ) air or ( ) sea?
16.The reservoir is filled ( ) water.
17.The firemen opened the door ( ) an axe.
18. Don't take ( ) my umbrella. I shall use it.
19. Brain dialed 999 to ask ( ) help.
20. Mr. Ma will come back ( ) an hour.