—It’s too late. I have to go now.

—Oh, it’s raining outside. Don’t leave _______it stops.

A．since  B．until    C．while

Disasters happen all the time somewhere in the world. Are you ready if one hits your neighborhood next week? Find out what you need to do now before it is too late. Let’s take an earthquake for example.
During an earthquake, get under a strong object like the kitchen table. Don’t leave the building during the shaking, or you might be hurt by falling objects from the outside of the building.
When you are in bed during the night and an earthquake happens，simply roll off the bed. There will be a safe void around the bed.
If you are watching TV and you cannot easily run away by getting out through the door or window, then lie down and curl up(蜷伏) next to a sofa, or a large chair.
Never go to the stairs. The stairs are likely part of the building to be broken. Even if the stairs are not destroyed by the earthquake，they may fall down later when people run down.
Try to get into an open area away from trees，buildings，walls，advertisement boards and power lines if you are outdoors.
If you are driving when an earthquake suddenly happens，just stay in your car until the shaking ends. However, if the footbridge falls and breaks your car，get out of it and sit or lie next to it. All the broken cars have voids 3 feet high next to it.
【小题1】 What should you do if you are in a building when an earthquake happens?

The population of the Earth is growing faster. It is important that we look after the Earth. We need it!

The Earth gives us a lot of things. We also give the Earth a lot, but some of the things are not good.

In nature, when something dies, other animals and plants get food from it. Every animal or plant gives food for other animals or plants. However, animals can’t get food from many of the things that we ‘give’ the Earth. Animals and plants can’t eat metal, plastic and glass. These things will stay in the ground for many, many years.

    Some rubbish is very dangerous for plants and animals. In some places, many animals live together. One animal makes food for many more animals. If we put rubbish and chemicals in the water, the plankton(浮游生物) can die. If there isn’t any plankton, many animals have nothing to eat.

    So what can we do? Don’t leave any rubbish in the countryside! Don’t make so much rubbish!

1. The Earth gives us ___________.

    A. food         B. rubbish              C. chemicals        D. pollution

2. When something dies in nature, _________.

    A. water and grass are polluted             B. plastic and wood become food

    C. other animals and plants get food        D. metal and glass stay in the ground

3. We must _______ to look after the Earth.

    A. put metal in the ground              B. use more wood

    C. keep frogs in the water              D. make less rubbish

—It’s too late. I have to go now.  
—Oh, it’s raining outside. Don’t leave         it stops.