10．Saturday，5th June Dear Estelle， I hope you're well and not working too hard!I've been preparing for my exams now for the last two weeks．That's why I haven't written for such a long time． Since the beginning of this year we've been doing a project called"World Class"．Have you heard of it？Not everyone in the class could take part，but luckily I could．The school chose a"twin school" In a different area of the world．Our head teacher chose a school in Uganda，a country in Africa．They gave us someone to write to from that school．For three months，I've written to a girl called Louisa，who is the same age as me． It's been so interesting to hear about her life．She's told me all about her school and described her daily life．I can't believe that her school doesn't have any electricity．She goes to school from eight o'clock in the morning until six o'clock in the evening．I can't believe how lucky we are here! I love it because it's the first time I've thought about what life must be like somewhere else．I can't believe people miss classes here when everything is so easy for us．I think more people should help out with projects like this．At the weekend we're going to have a sports day to help raise money to send to the school．Perhaps one day I'll be able to go to Uganda and meet Louisa myself-who knows？ Lots of love， Suzanne75．Suzanne hasn't written to Estelle for long because she isB． A．writing to a girl B．preparing for her exams C．busy doing a project D．choosing a"twin school" 76．Suzanne feltD to take part in the Project"World Class"． A．strange B．surprised C．thankful D．lucky 77．Suzanne and her classmates willC to help their twin school this weekend． A．write letters B．send clothes C．raise money D．go to Africa．
7．How did ancient people tell time？ ◆Natural ways of keeping time In ancient time，people had to use the sun and the moon to tell time．They got up when the sun came up and worked in the fields until the sun went down． ◆Man-made things The sand clock is made of two glass balls joined by a narrow neck．The top ball was filled with sand．The sand slowly moved through the neck into the bottom（底部） ball．People knew the time by watching how much sand fell to the bottom ball．People also made the water clock．They made a small hole near the bottom of a pot．When the water in the pot dripped（滴） out，marking（刻度） inside the pot showed how much time passed． ◆Body clocks in living things Animals'body clock Animals don't need clocks to know time．They have their body clocks．Birds know when to fly to warmer places before winter．Some animals know when to keep more food for the winter．Some fish know when it's time to move up the river and lay eggs． Plants'own clock Plants have their own clocks to keep time．Plants know when to open flowers or when to drop their leaves． Body clock in human beings People also have their own body clocks．When we get used to our lives，our body clocks can be very exact．It can tell us when it's time to wake up．It can also tell us when to eat or to go to sleep． 74．How could an ancient farmer know when to go back home from the field in the daytime？C A．By looking at the moon B．By the sand clock or the water clock C．By looking at the sun D．By feeling whether tired or not 75．According to the passage，how can animals know time？A A．They use body clocks B．They ask other animals C．They use the sun and the moon D．They make something to tell time 76．How many kinds of living things with body clocks are mentioned（提到） here？B A．Two B．Three C．Four D．Six 77．In what way is the sand clock the same as the water clock in telling time？D A．Both of them have a neck B．Both of them have two glass balls C．Both of them can be used only once D．Both of them give the time by quantity（数量） 78．The passage is mainly aboutC． A．man-made clocks B．nature's clocks C．time and clock D．how people keep time．
