— We should protect their homes first.
you tricks on that cat.
By taking exercise, we can .
—So it is. It is to hold more than one thousand people.
Why are you sitting there ?
Lately, people have entered the forests where chimpanzees live. The chimpanzees have been getting sick because of people's diseases. In addition, people are hunting chimpanzees. Their number is becoming smaller and smaller.
Chimpanzees live in the plains and forests of Africa. They eat many kinds of foods, from plant leaves and seeds to insects and even other small animals. Chimpanzees' favourite food is fruit.
Chimpanzees are very clever and they can use tools well. They can catch bugs by using sticks, and break nuts by using rocks.
The world's forests are much smaller than they were before. Roads were built in deep forests, so people start to enter the forests where chimpanzees live. That may lead to many problems. One problem for chimpanzees is that they can easily catch people's diseases and die.
Chimpanzees are much closer to people than monkeys.
As it's easier for people to enter forests, they hunt more often. Young chimpanzees are caught to be pets or for scientific research. The young ones are taken away from the forests, and the adults are killed. Chimpanzees are likely to disappear in the future.
—I've spent two hours (read) books every day. It helps me a lot.
—I think so. It can make us __________.
—We should write to factories and ask them to stop polluting the river.
There are many brave and talented people who work in different branches (分科;分支) of science. Extreme (另类的) scientists are people who work in very difficult and dangerous places. They don't work in a1all the time like other scientists do. Instead, they search2information that can only be gathered through firsthand experiences. These scientists have to explore deep, dark caves, swim with sharks or act as swan mothers. The number of great white sharks in the world3smaller now. They are one of4animals on Earth.
Scientists need to find out how many sharks5now. Sometimes scientists have to get very close to a shark. The easiest and6way to do this is from inside a shark cage.7, sometimes sharks attack the cage. They shake it, and bend the bars with their sharp8. The trumpeter swan is the largest swan in the world, but it9until it nearly became endangered birds. Because of this, parents swans10younger swans to migrate before.
Scientists have to teach the younger swans how to do it. They teach the swans to follow a plane which looks like a lead swan. Extreme scientists are always trying to discover something new.
