A big earthquake hit Ya’an the morning of April 20th,2013.
It’s very not outside. Why don’t you stay at home?
Do you know the teacher who is having an English lesson.
Let’s buy some more books this afternoon.
—Would you please pass me the sugar?— ____. Here you are.
In our school library there ____ a number of books on science and the number of them ____ growing larger and larger.