— I’ve never been to the Great Wall, what about you? — ______. I think it must be very great.
-The weather is getting worse and worse. -_______.
The boy_______ play with his mother's iPad very well when he was only three.
Look! There are lots of people_______ the underground.
Now, everyone, please turn to Page_______ and look at the_______ picture.
- Whose desk is it? - I'm not quite sure. Maybe it is_______.