_ 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.
He pointed at the new car and asked, "___ is it? Have you ever seen it before?"
Jonathan and Joe left the house to go for__ after supper.
Don’t ask him how old he is. He’s really ____about it.