题目内容：

根据对话内容，从方框中选择恰当的句子，将对话补充完整。(选项中有两项是多余的)

A: Have you heard of life in space, Mary?

B: No, not yet. 1.

A: UFOs? You mean the aliens (外星人)? B: Yeah!2.

A: Really? When did he see them?

B: Oh, it was about one o’clock in the morning. He was going out of bed todrink some water. Then he heard something outside. So he went to the window and looked out.3.

A: What was it? A plane?

B: No, it was a UFO. Then he saw three short aliens in his garden!4. He ran to get his camera.

A: And then?

B:5.

A: Oh, no, what did he do then?

B: When he came back to the window, the aliens went away.

A. There was red light in the sky.

B. A UFO landed when I was walking in the street.

C. But I have known about UFOs.

D. They had no hair on their heads.

E. You must be dreaming.

F. He couldn’t find his camera.

G. And Tom has seen them before.