I think the most helpful invention is light bulb. It seeing in the dark, and it gives people more time to work and play every day.A. used to B. is used to C. is used for
—_______________________? —He went shopping.
It’s reported that the price of the houses in this city is __________8 hundred every year.
_______the large population, we’ll _________ energy and water.
—Could you tell me something about your uncle? —Sorry, I__________ him recently.
The program provides the homeless people_____ homes and trains them ______ they can find a job again.