⑴ ____            A. Beijing is a great city.

⑵ ____              B. Time to go back to school.

⑶ ____          C. Don't forget to take some pictures.

⑷ ____          D. I'm putting on my new coat.

⑸ ____               E. What a fun trip!

在对流层中对天气变化有重要影响（　　）

    One day, a little schoolboy went home with a pain in his stomach.

    "Well, sit down and 1 a cake," said his mother."Your stomach 2hurting because it's empty.It'll be all right when you've got something in it."

    Five minutes later, Dad came home 3 the office.And he said he had a headache.

    "That's because your head is 4," said his clever son."You'll be all right if you have got 5 in it." His dad and mum laughed.

—Let's play computer games.

—That _________ good.