单选题The old musician decided to move to her country home______her advanced age and poor health.

单选题______ does he know that the police are about to arrest him.

单选题 There is (few evidence) that children (in language classrooms) learn foreign languages (any better) than adults in similar (classroom situations).

单选题 Here's some good news for parents of tweens and teens: you rule. That may be hard to believe sometimes. And it's true kids won't always follow your health and safety roles. But studies show parents who keep setting boundaries make a huge difference. The latest example is a survey on media use by the Kaiser Family Foundation. It found that typical kids ages 8 to 18 spend an astonishing 7 hours and 38 minutes a day consuming entertainment media, indulging deeply in TV, computers, games, cellphones, music players and other devices while occasionally glancing at books and other non-electronic media. Many experts, including the pediatrics academy, consider that much screen time is bad for mental and physical health. But the study also found that kids whose parents set any time or content limits were plugged in for three hours less each day. 'Parents can have a big influence,' says Kaiser researcher Vicky Rideout. 'The reality is that teenagers care deeply what their parents think,' says Kenneth Ginsburg, a specialist of the Children's Hospital of Philadelphia. 'The challenge for parents is to get across roles and boundaries in a way that doesn't feel controlling.' Research shows that parents who set firm rules but explain and enforce in a warm supportive way work better than those who set no rules, fail to enforce them or rule with a 'because I said so' iron grip. Ideally, 'kids understand the rules are about their well-being and safety,' Ginsburg says. Still, achieving just-right parenting is 'challenging', says Margaret Broe-Fitzpatrick, a teacher in Kensington, Md., who has four children, ages 8 to 16. 'There are so many different things to keep track of.' She and her husband keep their kids busy with sports and other activities, limit screen time and review the music their children download. They talk with their 16-year-old son about the rules he'll face when he gets a driver's license soon. But, she says, they can't police everything the kids encounter on the Internet or in friends' homes. 'We're just doing the best we can,' she says, 'even if young people may protest at first, they do feel more safe and secure when limits are set.'

单选题One of the women had pretended to be the old woman asleep in bed.

单选题Inexperienced as he is, he has succeeded ______ other experienced researchers fail.

单选题You should visit the Empire State building ______ you are in New York.

单选题Karl Von Linne (or Linnaeus, as he is widely known) was a Swedish biologist who devised the system of Latinised scientific names for living things that biologists use to this day. When he came to (1) people into his system, he put them into a group called Homo and Linne's hairless fellow humans are still known biologically as Homo sapiens. (2) the group originally had a second member, Homo troglodytes. It lived in Africa, and the pictures show it to be covered (3) hair. Modern (4) are not as generous as Linne in welcoming other species into Man's lofty (5) , and the chimpanzee is now referred to (6) Pan troglodytes. But Pan or Homo, there is no (7) that chimps are humans' nearest living relatives, and that if the secrets of what makes humanity special are ever to be (8) , understanding why chimps are not people, nor people chimps, is a crucial part of the process. That, in turn, means looking at the DNA of the two species, (9) it is here that the (10) must originate. One half of the puzzle has been (11) for several years: the human genome was published in 2001. The second has now been added, with the announcement in this week's Nature (12) the chimpanzee genome has been sequenced as well. For those expecting (13) answers to age-old questions (14) , the publication of the chimp genome may be something of an (15) . There are no immediately obvious genes--present in one, but not the other--that account for such characteristic human (16) as intelligence or even hairlessness. And (17) there is a gene connected with language, known as FOXP2, it had already been discovered. But although the preliminary comparison of the two genomes (18) by the members of the Chimpanzee Sequencing and Analysis Consortium, the multinational team that generated the sequence, did not (19) any obvious nuggets of genetic gold, it does at least show where to look for (20) .

单选题The clumsy movement of the giant panda amused all the______.

单选题China started its nuclear power industry only in recent years, and should ______ no time in catching up.

单选题Why did the nobles wish to kill Henry?

单选题It was the open space in Austin that initially overwhelmed me. A) completely B) originally C) temporarily D) permanently

单选题My father says he's going to ______ smoking. [A] give up [B] put up [C] set up

单选题All their attempts to ______ the child from the burning building were in vain.

单选题Woman: Nobody told me that Bill was in hospital.Man: Sorry, I meant to give you a call when I found out, but it slipped my mind.Question: What does the man mean?

单选题The English language contains a(n) ______ of words which are comparative seldom used in ordinary conversation.

单选题The word "weaklings" (Paragraph 2) most probably means ______.

单选题The Prime Minister refused to comment on the rumor that he had planned to______.A. dischargeB. dismissC. resignD. resume

单选题Certainly I'll come, but I am afraid I shall be ______.