The water behind the Three Gorges Dams (三峡大坝) should be ______ higher than downstream（下游）。

There are _______ days in a year.

---How many teachers are there in your school?

--- __________. , but I'm not sure.

There are _________ doctors and nurses working hard in that hospital.

--- What's one fourth and a half, do you know?

--- Yes, it's _________.

Now children, turn to page ________ and look at the _______ picture in Lesson Two.

Both of the two rulers are broken. I want to buy a _______ one.

December is the __________ month in year.

--- What is the date today?

--- It's _________.

She knows a lot about China as she has been to China ________.