题目内容
The expression "the final straw" in Paragraph 3 could be best explained as______.
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【35】
Near the border the writer could not see the hills because ______.
听力原文：W: Excuse me. My watch stopped running and I'm not sure what's wrong with it.
M: Well, let me look at it.
W: OK. It's a new watch. I've only had it for about a year.
M: Hmmm, it seems that it just needs a new battery. They only last about a year, you know.
W: Oh. That's a relief. I was hoping it wouldn't be broken or something. In fact, last week I got some water on it and I was afraid that the water might have ruined it. How much is a new battery？
M: It's six ninety-nine plus tax for a battery.
W: Oh dear, that seems like a lot. I thought my friend said she paid about three ninety-nine plus tax for a battery.
M: Well, she may have. But we are a watch-repair shop and we install your battery and then guarantee it for a year. If you have the watch cleaned here, we guarantee it for an additional three months.
W: Well, I guess you get what you pay for. I'll get my battery here. How long will it take to put it in？
M: Usually I can do it right away, but right now I'm way behind in my repair of a large shipment of watches. They all need to be fixed by this afternoon. Can you leave your watch here until about 5:00 p. m. ？
W: Oh dear, I'm afraid I can't. I need to get back to work and I have to work this evening, so I couldn't pick it up by five. And I have to have it by tomorrow.
M: Well, then maybe I can just squeeze it in now. It'll only take a few minutes. Can you wait？
W: Oh, I'd really appreciate that. Sure, I'll wait.
M: OK. Just sit down over there. I'll have it fixed in a few minutes.
W: Thanks a lot.
What is the problem with the woman's watch？
AIDS is the fifth leading cause of death among persons between ages 25 and 44 in the United States. About 47 million people worldwide have been infected with HI~ since the start of the epidemic.
AIDS stands for "Acquired Immune Deficiency Syndrome". It is caused by the Human Immunodeficiency Virus(HIV). AIDS is the final and most serious stage of HIV disease, in which the signs and symptoms of severe immune deficiency have developed.
HIV has been found in saliva, tears, nervous system tissue, blood, semen, vaginal fluid, and breast milk. However, only blood, semen, vaginal secretions, and breast milk have been proven to transmit infection to others.
Transmission of the virus occurs through sexual contact, blood transfusions or needle sharing, and from mother to child. A pregnant woman can passively transmit the virus to her fetus, or a nursing mother can transmit it to her baby.
Other transmission methods are rare and include accidental needle injury, artificial insemination through donated semen, and through a donated organ.
HIV infection is not spread by casual contact such as hugging and touching, by touching dishes, doorknobs, or by mosquitoes. It is not transmitted to a person who donates Blood or organs. However, it can be transmitted to the person receiving blood or organs from an infected donor. This is why blood banks and organ donor programs screen donors' blood and tissues thoroughly.
How many people worldwide have been infected with HIV since the start of the epidemic？
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