Mum, may I havesome cakes?——Sorry, there’s ____ left in thebox. I’llgo and buy some for you tonight.

I have bought such a watch _______ was advertised on TV.

Only after__________ his work __________ to see his grandfather.

In the library new books have to be ___before they are put on shelves for reader’s use.

Sometimes the police are not absolutely sure that someone has committed a crime, but ________ him of having done it.