—He is from America and majors in Chinese history in China.—_____.
The boss____________ the worker how to do it, or the accident couldn't have happened.
She liked the dictionary so much that she would like to take it ____________ it cost.
Don't be joking. It's time to____________ your business.
It may not rain, but you had better take an umbrella__________.
I'd like to be a professional singer, but I don't think I've got