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听力原文：W: Hello．This is Mary．I'm calling to see if my blood test results are in.
M: Dr. Miller just sent them to the lab last night，so the earliest time they could be back is tomorrow morning．
Q: What does the man mean？
(16)
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What does the last paragraph indicate？
W: Why don't you try house-sitting？ Last summer my friend Margaret house-sat for the Dodds when they went away on vacation. Mr. Dodd hired Margaret to stay in their house because he didn't want it left empty.
M: You mean the Dodds paid Margaret just to live in their house？
W: It wasn't that easy. She had to mow and water the houseplants. And when Eric house-sat for Mr. Cohen, he had to take care of his pets.
M: House-sitting sounds like a good job. I guess it's a little like baby-sitting-except you're taking care of a house instead of children.
W: The student employment office still has a few jobs posted.
M: Do I just have to fill out an application？
W: Margaret and Eric had to interview with the house owners and provide three references each.
M: That seems like a lot of trouble for a summer job.
W: The house owners want some guarantee that they can trust the house-sitters. You know, they want to make sure you're not the type who will throw wild parties in their house, or move groups of friends in with you.
M: House-sitters who do that sort of things probably aren't paid then.
W: Usually they are paid anyway just because the homeowners don't want to make a fuss. But if the homeowner reported it, then the house-sitter wouldn't be able to get another job. So, why don't you apply？
(20)
听力原文： The diamond is considered the most famous, elegant and valuable jewel in the world. It is the hardest substance found in nature. Its hardness and high dispersion of light make it useful for industrial applications and jewelry.
Diamonds were made as a result of great volcanic heat and pressure. A volcano is a mountain with a hole in the top. When a volcano is very active it sometimes explodes and causes great damage.
Diamonds were pushed towards the surface of the earth-millions of years ago-by a number of great volcanic explosions. It is in the narrow volcanic pipes that diamonds are found. They are also found among the sand and stones of certain riverbeds, and in a few places on the floor of the sea, for they were washed down the mountainsides by the rain.
Diamonds are very rare. There are not many diamond pipes or diamond-producing rivers in the world. During the last century, adventurers from Europe went to Brazil, because they had heard that there were diamonds in the River Amazon. [34]Most of these early diamond miners died of illness or were lost forever in the great forests.
The earliest known diamonds were found in India many centuries ago. The most recent and exciting discoveries have been made in Eastern Russia. But most of the world's diamonds now come from the Congo, from Tanzania-which has the largest diamond mine in the world-and from South Africa.
(33)
Both Felix Warneken and Josep Call agree that ______.
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