afraid of anyone; upperclassmen will pick on you more if you let them know you're afraid. Just take it easy. Making some friends and staying with them will greatly help you get used to high school quickly. After the first week it's really not bad at all. Don't worry.

Eddie ,Aged 20

　　When I started high school I was really nervous too, especially since I had been homeschooled all through middle school and didn't really know anyone. I suppose the best advice would be to just relax. The first couple of days can be a little bit hard, but things will become easier before you know it.

21. What can we infer from Sharon's words about high school?

　A. Teachers are quite strict. B. Students often stay up at night

　C. Teachers provide little care for students. D. Students should make good use of their time.

22. Who mentions the importance of friends?

　A. David B. Frank C. Sharon D. Eddie

23. How did Eddie feel on his first day of high school?

　A. Excited B. Worried C. Bored D. Relaxed

　　　　　　　　　　　　　　　　　　B

　　A mother goat is able to pick out her own baby from its voice alone by the time the kid is just five days old.

　　Researchers from University of London played kids' bleats to female goats and studied their responses. They were surprised to find that the animals were able to pick out their own kids' voices.

　　"A mother and the kid rely a lot on smell to recognize one another and, in the wild, during the first week of their lives, the animals hide in grass and don't call much. It's a strategy they use to avoid enemies," Dr Elodie Briefer, who led the research, explained to BBC News. "The mother call to the kids when she want them to come and feed, so we expected that kids would recognize the mothers' voices." In fact, this was the case for deer, which also use this hiding strategy, although they do not belong to the same family of species as goats.

She and her team recorded and played back young kids' calls to the female goats and