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
—What is your father like?-- _______________.
—_____ do you _____ the book? —It’s very interesting.
—It’s 9:15 now. What class? —Math. They have a math class every day.
—story books every day? —No, but now I.
Could you help me ________?