Moviegoers know that many special effects are created by computers, they often don' tknow is that these scenes still require a lot of work.

Not until the game had begun __ at the sports ground.

John complained to the bookseller that there were several pages______ in the dictionary.

_ is known to the world, Mark Twain was a great American writer.

I haven' t been to a pop festival before and Mike hasn' t __

You'd better take these documents with you __ you need them for the meeting.

If their marketing team succeeds, they __ their profits by 20 percent.

Nowadays little knowledge __ to be a dangerous thing.

My father asked __ to help with his work.

He pointed at the new car and asked, "___ is it? Have you ever seen it before?"