--- Mum, could you buy me a dress like this?---Certainly, we can buy_______ one than this, but_______ this.
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?