Jane looks really tired and sleepy.— I’m not surprised at all. She often too late and hasn’t enough sleep.

Two Xiaogan Evening Papers, please!— Sorry, sir. Only one left. Would you like to have ______?

A: _____is Mary?B: I think she is at home．

Do you know _____I saw yesterday? It was my favorite star, Jackie!

While he was investigating ways to improve the telescope, Newton made ________ discovery which completely changed ________ man’s understanding of color.