-Our classroom__________ every day.-So it is. It’s our duty to keep it clean and tidy.A. cleans B. is cleaning C. is cleaned
The Maths problem is so difficult that _______ students can work it out.
It’s quite cold outside, you had better _________the windows.
The number of the giant pandas in China is getting but the red crowned cranes are getting .
Look! There are many in the sky. I think it will be tomorrow.
We call her XiWang. What kind of sentence structure is it?