—How many students are there in the classroom? — .They are all in the lab.
________ quiet, please. My baby is sleeping. A. Be B. Being C. Is C. Are
The telephone ________ in 1876.
Look! The workers ________ some subways now. the traffic in Nanning will be better soon.
You will be late for school ________ you don’t get up early.
Animals are our good friends. We are supposed ________ them.