useful invention(发明) the computer is!
—Is the wine made ________ wheat?—Yes, it is made ________ China.
_______ you ________ the book to the library yet?
There were few people ________ on the ice when we got there.
Dick _______ in England, but he has been _______ Chinese food since he moved to China.
People are encouraged to ________ paper and water for a better environment.