7. This passage mainly tells us
.
A. what is a computer virus
B. what is the damage of a computer virus
C. how to delete a computer virus
D. how to avoid getting a computer virus
C
A
Wolf
in
Danger
What is happening to the timber wolf today?
Native Americans and early settlers often went to sleep to the sound of a lonely lullaby(催眠 曲). It was the song of the wolf howling in a distant forest. There were many wolves then. One
kind was the North American timber wolf.
Wolves are important to the balance of nature because they eat sick and weak animals. In Colorado, people tried to help deer by shooting wolves. But then there were so many deer that many of them starved to death.
The timber wolf is on the endangered special list. Animals on this list are in danger of disappearing from the earth. People drove the wolves away by cutting down the forests to build houses, towns, and highways. Timber wolves are now found only in Canada, Alaska, Michigan, and Minnesota.
This special animal may soon disappear from our forests forever. Then, its lonely howl will never be heard again.
8. Wolves help the balance of nature because they
A. are an endangered species B.
C. eat sick and weak animals D.
9. At one time, the timber wolf was found _.
A. in many parts of Africa B. only in Colorado and Canada
C. in towns and cities in Alaska America
10. Which of the following happened first? A. People cut down the forests.
B. The timber wolf was driven away from its home. C. People built towns and highways.
D. Timber wolves are endangered species.
11. When people in Colorado shot the wolves, they made a mistake because
A. wolves never attacked other animals B. the wolves kept down the number of deer
_.
D. in many parts of North help the farmers
no longer live in forests
.
C. the wolves were starving and would have died anyway
D. they kept the balance of nature
