如图，已知BC是⊙O的弦，A是⊙O外一点，△ABC为正三角形，D为BC的中点，M为⊙O上一点，并且∠BMC=60°．

如图，△ABC中，AB=AC，∠A=36°，BD平分∠ABC．求证：$\frac{BC}{AB}$=$\frac{\sqrt{5}-1}{2}$．

    Today is the last Saturday before Christmas. Everyone in the USA 1 shopping for presents. 2 is falling. People are walking fast. They are trying to keep3 when they move from shop to shop. In the shops children are 4 at the toys. They are talking to a man called Father Christmas. He asks, "What do you want for Christmas?"

    In the USA it is warm and beautiful in summer. The trees and fields are green then. But now it is winter and 5is white.

    At 6, small lights make the houses and buildings 7. Christmas is a beautiful 8 of a year.

    Christmas Day always begins before 9. Children wake up very early in the morning. They open the 10from their parents. Then they wake up their parents, saying "Merry Christmas."

完形填空

      Li Lei has a good friend.    1    name is Jim. He is   2     the USA. He likes   3    food very much. He can    4    English and   5    Chinese. Li Lei and Jim are in the same(相同的)   6   . They are classmates(同学). They go to school five    7    a week. They stay    8   home on Saturdays and Sundays. At school they play    9    after class. They like swimming,    10   .