The company suffered a heavy ____ because of the accident
There are more than 200________ stars in our galaxy A. billions B. billions of C. billion
He is an ___________ boy from a small village in Guangxi. A. eight—year—old B. eight—years—old C. eight year old
You have heard of him, ___________?A. don’t you B. didn’t you C. haven’t you
She ___________ to Shanghai on business. A. have been B. has gone C. has been
Have you __________ entered a composition? A. ever B. already C. never