What's the best title for this passage、

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• 1                                          C    Babies sleep for up to eighteen hours a day. Sleep. No one can live without it.  71  Research (研究) by the National Sleep Foundation in Washington says that we all need eight hours' sleep every night. Scientists have found that people who sleep for less than six and a half hours a night are more often ill than people who sleep for eight hours.  72  "Workaholics" (工作狂) who sleep for less than five hours often die young, and do less well at work.    It also says that the idea that we need less sleep as we get older is untrue. "People have no idea how important sleep is to their lives," Dr. Thomas Roth, director of the Foundation says.  "  73  ".    "But not too much of it,” says Professor Jim Home. "Sleep is like food and drink," he believes: "  74  "Professor Home studied a group of people who could spend as many hours as they wanted in bed; after ten hours they didn't find it any easier to get up in the morning. And people who sleep for more than nine hours a night die younger than people who usually sleep for seven or eight.

  A.But how much do we really need、

  B.You would always like to have a little bit more, but that doesn't mean you need it.

  C.Good health needs good sleep.

  D.Going without sleep also increases the chance of illness.

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• 2From the emails, we know that ________.

  A.Joe, Rena and Beth study at different schools

  B.Beth didn't forward the message to Rena

  C.Joe has said sorry to Rena many times already

  D.Rena hasn't forgiven Joe yet

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• 3What advice did Aggie give Joe、

  A.Joe, Beth and Rena should have a talk together.

  B.Joe should wait for some time before saying sorry to Rena.

  C.Joe should ask Beth to explain (解释) that to Rena.

  D.Joe Should say sorry to Rena and then send her some flowers.

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• 4What does the underlined (画线的) sentence mean in the second email、 It means "________".

  A.because you don't know who the email is for

  B.because you can never know who will get your email at last

  C.because you don't know where your email was written

  D.because you never know where the message is from

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• 5After Rena's feelings got hurt, what did Joe do、

  A.He emailed her and said sorry.

  B.He asked Beth what he should do.

  C.He emailed Aunt Aggie for help.

  D.He said sorry to Rena face to face,

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