单项选择题：关于免疫增殖性疾病的说法正确的是A．仅T细胞异常增殖所致的病 B．仅B细胞异常增殖所

题型：阅读理解

Sam and Joe were astronauts. There was once a very dangerous trip and the more experienced(有经验的) astronauts knew there was only a small chance of coming back alive. Sam and Joe, however, thought it would be exciting though a little dangerous. “We’re the best men for the job,” they said to the boss. “There may be problems, but we can find the answers.” “They’re the last people I’d trust(信任),” thought the boss. “But all the other astronauts have refused(拒绝) to go.”

Once they were in space, Joe had to go outside to make some repairs(维修). When the repairs were done, he tried to get back inside the spaceship. But the door was locked. He knocked but there was no answer. He knocked again, louder this time, and again no answer came. Then he hit the door as hard as he could and finally a voice said, “Who’s there?” “It’s me! Who else could it be?” shouted Joe. Sam let him in all right but you can imagine that Joe never asked to go on a trip with Sam again!

小题1:Most of the astronauts don’t want to go on the trip because _________.

A．there was little chance to go

B．they weren’t experienced enough

C．they thought it was too dangerous

D．it wasn’t exciting enough小题2:Why were Sam and Joe chosen?

A．The boss wanted them to get more experience.

B．The boss trusted them more than anyone else.

C．They were the best people who could go.

D．They were the only men who wanted to go.小题3:The writer tells this story to _________.

A．show the easy side of the astronauts’ life

B．show the funny side of astronauts’ life

C．make people laugh at all the astronauts