---How long did you spend going through the jungle during the exciting vacation?---Going through the jungle______ us about three weeks.
There ____ a book and a pen on the desk.
The cup is on _____ desk.
Are they doing____ homework?
What are you ____?
--____ does Mary ___? ---The USA. A. When; come from B. Where; from C. How; go D. Where; come from