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
-Could you please tell me where __________? -Sure. He is in the office.
-Is that Mary? -No, it _______be her. She has gone to Tokyo.
-How tired we are! -Yes. ______we have math tests, _______we have physics tests. So many tests.
-It’s said that English ________all over China. -Not really. Only some can speak __________ English.
Don’t forget to lock the door if you are the last person _________.