— So we should wear a scarf (围巾)when going out.

—Oh, she gave me a     of biscuits. Do you want some？

Some scientists say that the weather in the future won't be good. Summers will be hotter. Warmer, wetter winters are on the way. Terrible droughts (干旱), floods, wildfires, and storms may often happen.

What's the reason for all those wacky weather changes?

Global warming causes (导致) some weather changes. Global warming happens when gases in the air take in the Sun's energy. That energy heats the Earth. Without the gases, the energy would go into space. Some global warming is good. Without it, the Earth would be too cold to live on.

For years, humans make lots of pollution. Pollution is one of the reasons for global warming.

There are some signs (迹象) of global warming. One of the signs is happening in the coldest parts of the world. Near the North and South Poles, large ice sheets (冰原) are breaking up. Scientists think some may disappear by the year 2100.

Because the ice melts, ocean levels rise. This might cause floods.

In some areas, global warming might cause droughts. Droughts may cause wildfires.

Scientists say that cutting down air pollution will slow global warming. One way to lower air pollution is to drive less. People also need to find cleaner ways to make electricity.

Do you want to feel happy and know how great you are in your life? Here are five (way) to make you feel good about yourself. Encourage (鼓励) yourself. Look in the mirror and say to (you), "I am a special person and there (be) no one in the world like me. I can do anything." It may not sound so good, but it really (work)!

Help others. Do something nice someone who always makes you feel good. This can make you have a good feeling.

Smile! Be friendly to people you meet. No one can refuse (拒绝) big smile.

Learn something new! New things may be great challenges, but you fall in love with them or get some progress, you'll be very (happily).

Stay with your family. We all need our family time. It's nice (talk) with your mom and dad or maybe even your cousins. This can make you feel warm give you confidence to get on well with others.