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
Mary writes __________ than __________ boy in her class.
Mother seemed __________ after she heard the bad news.
— Things in your room are all over the floor. Be sure to__________before the guests__________. — No problem.
When he walked __________ my desk, he knocked my books __________ the floor.
— I don’t know how to do it well. — Don’t worry. Here are some ________.