—She       the supermarket.

—Yes. The once nameless young man became a basketball hero suddenly.

—Yes, they ______ for fifty years.

I returned to this year in a time machine. In the year 2500, we are able to travel through time to any year in the history of the Earth. This year is your last chance to change your lifestyle to save the Earth.

Beginning in the middle of the 20th century, a few people were worried about polluting the Earth's water and air, but most people did not change their way of life. Instead, they continued to pour dangerous chemicals and other waste into lakes and seas, to drive more and more cars and trucks, and to cut down trees.

By the year 2200, the Earth's water was completely polluted. Scientists said that in the future there might be too many people on the Earth. People could no longer drink water, and they had to use other types of liquids(液体).

So by the year 2300, there were so many people that food became scarce. There was no water to grow food and all of the fish in the lakes and seas died because of pollution. Wars broke out between the rich and the poor. Scientists were working very hard to find another planet in space where humans could live on.

 By the year 2400, the air was too polluted for humans to breathe. So we had to leave the Earth. But only the rich were able to leave. Where did we go? Nowhere and everywhere. You see scientists did not find another safe planet, so now we must travel around the universe in our spaceships. We are still looking for a place to call our home.

So it is up to you to change history. There is still hope. You must change your lifestyle now, before it is too late.

    September is the time for students to go back to school! For Chinese students, most schools start on the same day. We will share summer stories with the same classmates 1 the first—year students. But in American schools, students get ready for classes a little 2.

    First of all, American schools don't all start on the same day. Classes begin any time between August and September. Every 3 decides when to begin its classes. If summer is too 4 then schools will usually start a little later.

    Every year we usually see the same teachers and classmates, but American students have some big changes. In American high schools teachers divide 5 into different levels. Students can choose their favourite teachers and courses according to their abilities and 6. This means that every year American students will 7 different classrooms or different classes. They will meet 8 classmates and teachers in each one. Also, students will go to school a few days early to get their 9 so that they can know the classes every day.

    For first—year students, the first day of school also means they finally get their own lockers. Primary school students in the USA have to share lockers with their 10.

    The whole school was talking about the winter camp. And everyone  (be) looking forward to it except me because I thought I would get homesick. But it was the way we grew up.

    When  (arrive) at the camp, we were asked to ski(滑雪)down to the field by the coach. I skied  (careful), but I still hit a piece of ice and fell down.

    "Haha!" somebody started laughing behind me. I looked back to see  was laughing at me. To my surprise, I saw  girl in the same embarrassing(令人尴尬的) position I was in. "I thought I'd be bad at this, but it seems  (difficult) than I expected!" she said. Suddenly, I started laughing too. After being so afraid of  (fall), it was comfortable not to fear it any more.

    The next day  I didn't want to go ski jumping, I was chosen to do first. But when my  (foot) left the ground, I felt I was flying and it was wonderful.

    Just do your best  (meet) every challenge. You'll never imagine how much you will get.