— Because I got up late.

— Every two days.

    When we talk about the universe(宇宙). We usually talk about the sun, the Earth, the moon and the stars.

    The Earth moves around the sun. And the moon moves around the Earth. The sun is much bigger than the moon. But sometimes the moon looks bigger than the sun. Because it's much nearer to the Earth.

    The sun is very bright. It gives very strong light. The moon looks quite bright, too. But it doesn't give any light at all.

    The moon looks bigger and brighter than the stars. But in fact the stars are much bigger and brighter than the moon. They look smaller than the moon because they're much farther away from us.

① The sun is the       (big) thing in our solar system.

②Mercury(水星) is the first planet in the solar system, so it is the       (near) to the sun.

③Venus(金星) is the brightest planet in the sky. It's much       (hot) than any other planet.

④The Earth is the third planet. It's very near to the sun. It's one of the       (hot) planets.

⑤Jupiter(木星) is the biggest and heaviest planet. It's much       (big) than the Earth.

⑥Neptune(海王星) is very far from the sun. It's one of the       (cold) planets in the solar system.

①He is tall than I am.                                            

② She is a little thiner than she looks.                                

③ Bob is heavier than any other boys in the class.                      

④ My brother's trousers are longer than my.                           

⑤ It is one of the longest story that I have ever read.                    

a．It's got about fourteen million people.

b．It's in the south of China.

c．Yes，I am.

d．It's in the west of America.

e．It's eighteen thousand three hundred kilometres.

①Where's Guangzhou?                      

②How long is it?                           

③Are you a teacher?                         

④Where's San Francisco?                     

⑤How big is it?