We work together to achieve our common purpose： ________ world that is safer， cleaner and healthier than ________ one we are living in.

A. the ； /           B. a ； /

C. the ； the          D. a ； the

完成短文。

As teenagers， you have a lot of dreams. These dreams can be very big， such as winning the Nobel Prize， or they can be small， you may just want to become one of the top ten students in your class.

Once you find a dream， what do you do with it? Do you ever try your best to make your dream real? Making our dreams real is life’s biggest challenge.

You may think you’re not very good at some subjects， or that it is impossible for you to become a writer. These kinds of thoughts prevent you from being successful.

In fact， everyone can make his dream come true. The first thing you must do is to remember the dream in your mind. Don’t let it leave your heart. Keep telling yourself what you want. Do this step by step and your dream will come true faster because a big dream is made up of small ones. Please never give them up.

You may have difficulties on the way to your dreams. But the biggest comes from you yourself. You need to decide what is the most important. Studying instead of watching TV will lead to better exam results， while saving five yuan instead of buying an ice cream means you can buy a new book. As you get closer to your dream， it may change a little. This is good as you have the chance to learn more skills and find new interests.

完成句子。

1. Li Lei does his homework at seven. (改为否定句)

Li Lei ________ ________ his homework at seven.

2.His sister had lunch at school yesterday. (改为一般疑问句)

_________ his sister _________ lunch at school yesterday?

3.The sweater costs 200 yuan .(划线提问)

_______ _______ does the sweater cost?

4.要下雨了.你最好带把伞.

It is going to rain.             Take an umbrella with you.

5.我们俩都不知道他的电话号码。

_______of us ______ his telephone number

---What is happening over there?

--- Oh， about ________ the fans are waiting here. They want to see the great singer.

A. two thousand of       B. two thousand

C. thousand of           D. two thousands of

I won’t make such a silly mistake again. I’ll be     next time.

A. careful           B. carefully

C. more careful       D. more carefully

We should keep the classroom     and tidy.

A. clean              B. cleaned

C. cleaning          D. to clean

My grandma is ill. The doctor asks her     in bed for a few days.

A. to stay             B. stay

C. stayed               D. stays

Ronald Amundsen is considered to be one of the greatest ________ in history because he was the first man to reach the South Pole (南极).

A. writers            B. composers

C. president           D. explorers

---Would you like ______ ， sir?

--- No， thanks. I have had much.

A. some more oranges          B. any more oranges

C. some more orange           D. any more orange

Although he’s eaten up two bowls of rice, he still doesn’t fell     .

A. full enough            B. enough full

C. enough fully           D. fully enough