The cookies _________ good．Could I have some more?

On March 23, many people took part in “_________ Lights” activity to help save energy.

How many teachers are there in your school?—About two _________.

What’s _______number of school in the city? —–I’m not sure ,but I know there must be _______ number of schools in it.

The Louvre in Paris is one of the most famous museums, housing many priceless _______.