.I think I had at least a billion test, __one in which they cut out a piece of muscle from my leg.

I’m trying to find yesterday’s paper. Have you seenit—I’m afraid I ______ it away. I thought you hadfinished reading it.

The winner of the race is tall and thin; he _______ be my friend, Mike, who is short and fat.

Making a loud noise in public does great _____to people’s hearing.

How long have you been away from your hometown — It has been twenty years ________ I went to college and work in Beijing.