5．
People might think that big things must be done to save the earth．Many forget that saving the earth（73）begins with small things．For example，you（74）can save electricity by（75）turning off the lights when you leave a room．You could also use reusable bags（76）instead of plastic bags．I think it's a great idea that you now（77）have to pay for plastic bags in some stores．And instead of driving to school or work，you could ride your bike or walk．If it's far，you can take the bus．All these small things can add up and become big things that would improve the environment．Let's（78）take action now!
| can have to turn on take action turn off instead of look after begin with |
1．
Jenny lives alone．She（91）cleansher house every day．
One day，Jenny saw a mouse（92）running across the floor．She was very afraid．So she ran to the shop to buy a mousetrap（老鼠夹）．The shopkeeper told her，"Put some cheese in it and the mouse （93）will be caughtsoon．"But when Jenny came back home，she couldn't （94）find any cheese．Then she cut a picture of some cheese and stuck it to the mousetrap carefully．
To Jenny's surprise，the picture of the cheese （95）worked well．She found a mouse in the mousetrap the next morning!
| run find clean work catch |
One day，Jenny saw a mouse（92）running across the floor．She was very afraid．So she ran to the shop to buy a mousetrap（老鼠夹）．The shopkeeper told her，"Put some cheese in it and the mouse （93）will be caughtsoon．"But when Jenny came back home，she couldn't （94）find any cheese．Then she cut a picture of some cheese and stuck it to the mousetrap carefully．
To Jenny's surprise，the picture of the cheese （95）worked well．She found a mouse in the mousetrap the next morning!
20．
The Browns live in New York with their little son．Mr．Brown often comes back home from work very （86）late．
One night he forgot to bring his （87）key．He had to ring the doorbell，but his wife didn't wake up．Then Mr．Brown knocked at the window and shouted （88）loudly．Still his wife didn't wake up．He had an idea （89）in the end．He began to speak like a small child，‘‘Mom!I want to drink some water．Mom!I want to drink some water．"His wife woke up right now （90）andopened the door for him．
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| in and late key loudly |
One night he forgot to bring his （87）key．He had to ring the doorbell，but his wife didn't wake up．Then Mr．Brown knocked at the window and shouted （88）loudly．Still his wife didn't wake up．He had an idea （89）in the end．He began to speak like a small child，‘‘Mom!I want to drink some water．Mom!I want to drink some water．"His wife woke up right now （90）andopened the door for him．
These days，the food that you buy comes from lots of different countries．When you go to the supermarket，you will see some kinds of fruits and vegetables you have never seen before．Have a look in your kitchen，fridge，cupboard and fruit bowl and check where the food comes from．Perhaps there are apples from California，lamb from New Zealand，or potatoes from Egypt．You will probably be surprised how far food travels to get to your plate．This journey，from field to plate，is called food miles．A food mile is the distance that food travels from the farmer's field to the person who buys the food．Nowadays，food often travels thousands of miles to get to the consumer（消费者）．Why is this，and what are the influences of these long distances？
They are children of the stars．They are not deaf，but they sometimes ignore information from outside．They are not blind，but they sometimes have no eye contact with people around them．They are not dumb，but they sometimes don't speak to anyone．They are autistic（自闭症的） children，living alone in their own worlds．