阅读理解。
What is a flood and where does it happen?
A flood happens when water pours over dry land.Floods can cause very big damage
when they happen unexpectedly.
Heavy rain can cause floods.If a lot of rain falls quickly,the earth is unable to soak (吸入)
it up,and the water builds up on the ground.When it runs off into the rivers,the rivers overflow
their banks.
The worst floods happen where the land is flat and low－lying.These areas are known
as floodplains.
What should I know if I live on a flood plain?
"Stay away from flood water."
Do not walk through moving water.It can knock you off your feet.If you must walk
through water,walk where the water is not moving.Use a stick to test the ground in front
of you."Stay away from power lines that are on the ground.You could be electrocuted (电死)．"
If you are scared,share your fears with an adult.Floods can be scary,but remember-the
water ALWAYS goes away!
What should I do if a flood happens?
1．Get to the meeting spot with your family.
2．Try to get to higher ground.
3．If you can not leave,get to a higher area in your home.
4．Listen to your family and follow all instructions carefully.
What dangers does a flood lead to?
Floods can lead to electrocution from down power lines,angry dangerous animals coming
out,drowning from high water levels or flash floods,as well as many other things.
1．A flood often happens except________.
A．when it rains heavily
B．when it hardly ever rains
C．where the land is flat
D．where the land is low－lying
2．You shouldn't walk through moving water because________.
A．you may lose your shoes
B．it may make you fall over
C．you may drink some dirty water
D．some fish can make you fall over
3．By saying "the water ALWAYS goes away" the author means________.
A．you needn't be afraid of floods
B．it is common for floods to happen
C．water can't be stopped from flowing
D．you should pay close attention to floods
4．Which of the following is not true according to the passage?
A．A flood may cause very big damage if they happen without warning.
B．If a flood happens,you should get to the meeting spot with your family.
C．If a flood happens,you should not go to a higher ground immediately.
D．If a flood happens,it can lead to electrocution from down power lines
5．We can infer from the passage that during a flood________.
A．gas should be cut off as soon as possible
B．running away is a good way to save yourself
C．people are more likely to be attacked by animals
D．adults should try to persuade children to keep silent