How can I ever concentrate on my work if you_____ continually_____ me with such silly questions?

The computer was used in teaching. As a result, not only _____, but students became more interested in the lessons. [ ]

There’ll be billions of people to watch the SpringFestival gala on TV tonight.——I know. The whole world______．It’s a really wonderful event.

You’d better______, or you may be cheated by your so-called net friends.

Mr. Black ________his keys in the office，so he had to wait until his wife ________ home.