The weather is different in different parts of the world．In some places it is 1 ,and in others it is humid．If the weather is too dry,the land will not be 2 for animals or plants(植物)．In humid weather there may be too much 3 ．The rivers may go over their sides．The 4 may take the bridge away．If the rivers go over their sides,a lot of people may not have enough food．If there is very dry weather for a long 5 ,the river beds may be dry．In some other parts of the world the weather may be very cold．There may be 6 ．When it snows,the trees,the buildings and everything look 7 ．In winter the days are short and the nights are long． 8 cold weather nights,when there are no clouds or winds,the 9 is very clear(晴朗的)．And the moon and the stars are very beautiful．People may 10 their coats and go out for long walks．When they come back to their houses,they may be happy to have hot coffee and cakes by the fire(火)．
Do you hope to move to another city or a foreign country?It may be interesting．But how about moving to 1 planet?A US company now has a plan：sending people to Mars 2 20 years．
To begin with,the company plans to send 3 people to go to Mars first．It will 4 them several months to get there．When they arrive,they will build a 5 first．
But Mars is not an easy place to 6 ．It is rocky,cold and has lots of sandstorms(沙尘暴)．Also,there is 7 air for breath．So people would have to live in a special house．They would have to 8 special clothes if they go out．
People will have to find 9 resources(资源),iron,water and so on．All these could help people live there…
Sounds interesting?You might want to go to Mars now． 10 will things go well as the company hopes?We'll wait and see．
Mr Turner is standing near the window．His wife,Mrs Turner,is sitting behind him．She is reading a book．She closes the book and asks her husband(丈夫),“What are you looking at?”
“I'm looking at a boy．”Mr Turner answers．“He's under the tree near our house．He is looking at my bike．”
“Oh,”Mrs Turner says,“what is he doing now?”
“He is cleaning the seat．”says Mr Turner,“Now he is riding my bike．”
Mrs Turner looks out of the window and then she says,“Ah,don't you know who he is?He is our son!He is going to school．You must wear glasses!”
Mr Turner is standing near the window．His wife, Mrs Turner, is sitting behind him．She is read-ing a book．She closes the book and asks her hus-band, “What are you looking at?”
“I'm looking at a boy,” Mr Turner answers．“He's under the tree near our house．He's looking at my bike．”
Mrs Turner says, “What is he doing now?”
He's cleaning the seat,” says Mr Turner．“Now he is riding my bike．”
Mrs Turner looks out of the window and then she says, “Ah, don't you know who he is? He is our son! He is going to school．You must wear glasses!”