.—This yard is so clean today and everything looks fine.—I didn't notice that. It's clear someone ________it.
When I went to say goodbye to Anna, shethe piano.
---Whose desk is that? ---It’s desk.
Kunming is famous its nice weather. I will go there to spend the summer holiday.
He’s been to the Great Wall,?
We believe scientists will a way to solve the problem of air pollution.