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
Jack’s shoes are old. He wants to buy a new ________.
— Would you like to have ________ coffee? — No, thanks. I don’t want ________ drinks now.
Doing morning exercises ________ good for your ________.
You should not eat ________ meat. It’s ________ bad for your health.
We want to buy some ________ and two ________ for supper today.