Do you know what American students have to do in their school? In America, at the beginning of the term, students must choose their c{#blank#}1{#/blank#} and teachers first. While in China students usually have no chances（机会）to choose.

    C{#blank#}2{#/blank#} is very important for your grades in America. So at the first term, don't choose too many courses, o{#blank#}3{#/blank#} you'll feel very nervous and it may influence your study. Then you have to ask for some teaching plans. There is some information about subjects, time arranging (安排), marks and t{#blank#}4{#/blank#}. At the same time, you must choose the teachers. Different teachers have d{#blank#}5{#/blank#} teaching ways. If the teacher is called "killer" by the last grade, many students will give up choosing him. Because this kind of teacher will leave too m{#blank#}6{#/blank#} homework, too many exams and give too low grades.

    There is a{#blank#}7{#/blank#} thing after you choose the courses and the teachers. It is hard for each student to buy textbooks. The textbooks in America are very e{#blank#}8{#/blank#}. Each copy is about $30~50. In order to save money, many students buy some used textbooks, and some students usually borrow textbooks f{#blank#}9{#/blank#} the school library. You must get ready before classes. In class, discussing is very important. The teachers e{#blank#}10{#/blank#} you to raise questions or show your own opinions. They don't usually ask you to sit well. I{#blank#}11{#/blank#}, they allow you to sit or stand everywhere you like. They don't give you much homework to do. You can learn some knowledge and do exercises by yourself.

    Birthday is an important day in one's life, especially（尤其）for children. For 365 days the child waits for that{#blank#}1{#/blank#}day because he will become{#blank#}2{#/blank#} on that day.

    Birthday is also the best time to have a{#blank#}3{#/blank#}with your friends and family members. To have a different birthday party, you need to prepare lots of things. You should have{#blank#}4{#/blank#}time to get everything ready. You may want{#blank#}5{#/blank#}of your friends to come to the party {#blank#}6{#/blank#}you spend much time preparing it. The best way is to send some beautiful birthday party invitations{#blank#}7{#/blank#}them. The birthday party invitations can tell them your birthday party plans.

    You can buy some birthday invitations in the{#blank#}8{#/blank#}. And you can choose birthday invitations on the Internet and send them to all your friends. If you have time, you can{#blank#}9{#/blank#}birthday invitations by yourself. You can draw some pictures to make your birthday invitations more{#blank#}10{#/blank#}. And you can write your birthday plans on it.

In San Francisco, there is a special group of volunteers. They call themselves Friends of the Urban (城市的) Forest (FUF). These volunteers want to {#blank#}1{#/blank#}. Every year, the FUF plants nearly 1,000 trees.

The FUF welcomes new volunteers all year round and in all parts of its work. On Weekend Planting Days, FUF volunteers work with common citizens (市民) to plant trees. The planting usually runs from 9 a.m. to 1 p.m. After the work is done, everyone {#blank#}2{#/blank#} over a community lunch.

On Thursday Planting Days, the FUF plants "replacement (替换) trees". As their name suggests, these trees replace trees {#blank#}3{#/blank#}. Planting Leaders are very experienced volunteers. They are able to help other volunteers at planting events. Planting Leaders usually wear a special FUF T-shirt. Some new volunteers know little about "replacement trees". They can easily find Planting Leaders and {#blank#}4{#/blank#}.