there will be less pollution in the air. There will also be more space for parking cars in cities, and the streets will
be less crowded. Three such cars can fit in the space now needed for one car of the usual size.
The little cars will cost much less to own and to drive. Driving will be safer, too, as these little cars can go
only 65 kilometers an hour.
The cars of the future will be fine for getting around a city, but they will not be useful for long trips. Little
cars will go 450 kilometers before needing to stop for more gasoline (汽油).
If big cars are still used along with the small ones, two sets of roads will be needed in the future. Some
roads will be used for the big, fast cars and other roads will be needed for the slower small ones.
B. people drive little cars
C. the cars go 65 kilometers an hour
D. the cars can go 450 kilometers an hour
B. much the same as
C. three times as large as
D. a little larger than
B. Big cars are not useful for long trips.
C. The cars of the future will be smaller than today"s cars.
D. Small cars are slower than big ones
B. there will be fewer passengers in the street
C. driving future cars will be safe
D. future cars will be much smaller
B. more and more people will get around a city
C. big cars and little cars may be used along with each other
D. it looks more beautiful to have two sets of roads
different animals.
A bat has four legs. A bird has only two. Bats have teeth and birds have no. Bats have large ears but bird"s
ears only holes in the head.
All bats like to eat insects (昆虫). They eat at night and sleep in the daytime. In the evening bats are busy
flying and catching insects. Its legs help it to fly. The piece of skin (皮肤) joins them together. It is just like a
wing.
Some people think bats can"t see. In fact it is not true. Bats have eyes, but they cannot see well. Bats have
better ears than men have. They can hear things which people can"t. They can feel where a thing is.
That is why the bats can fly about in the evening.
1. Is a bat a kind of bird?
__________________________________
2. Are bat"s ears bigger than bird"s?
__________________________________
3. Why can bats fly about in the evening?
__________________________________
4. Can bat see well?
__________________________________
5. What helps bat fly?
__________________________________
land of snow and ice near the South Pole (南极). Most people do not think there is much life in the icy (结冰的) waters around it. They are wrong.
Antarctica"s seas are full of life. There are many kinds of fishes, water birds, seals, and whales (鲸). They
eat the thick plant life in the sea and the smaller water animals. Some whales, for examples, eat more than a ton
of food every day.
The most famous animal of Antarctica is the penguin (企鹅). It struts (昂首阔步而行) around the icy
beaches as if it were a movie star walking down the street.
B. seal
C. penguin
D. fox
B. warm weather
C. flocks of geese
D. warm water
B. is little plant life
C. are many animals
D. is little snow
B. isn"t
C. is no
D. isn"t any
B. South
C. North Pole
D. South Pole
Each year, from top to bottom, a tree grows a new layer (层) of wood around itself. If you cut across a
tree trunk or branches, you would see that these layers of wood look like rings. By counting tree rings, you
can tell how old the tree is. If you count ten rings, for example, the tree is ten years old.
Looking at the picture shown above, you can see that each tree ring has a dark part and a light part. The
light part wood grows in the spring, the dark part wood in winter. Look also, that some rings in the picture
are wide and others are narrow (窄). Trees grow aide rings during the years when they get a lot of water and
sun-light. By examining tree rings, you can tell what the weather may was like many years ago.
Giant sequoia (红杉) trees, such as the one in the photo above, grow in north-western California. Some of
these sequoias have more than 3000 tree rings. Can you guess how old such a tree would be?
B: layer of wood
C: giant sequoia
D: ten years old
B: every year
C: every 3000 years
D: every two years
B: tells the tree"s age
C: grows in the spring
D: gets light every year
B: most trees do not grow tree rings
C: tree rings add to the tree"s width
D: most of the trees grow rings
B: five months old.
C: Six years old.
D: Ten years old.
During the day we work and play; at night we sleep. Our bodies rest while we sleep. In the morning we
are ready to work and play again. While we are asleep our bodies grow most. Children who are tired usually
need more sleep. We can get our lessons better and we feel better too, when we have had plenty of rest.
Boys and girls who are eight or nine years old need ten hours of sleep every night. Our bodies need plenty
of air when we sleep. If we do not get enough fresh (新鲜的) air we"ll feel tired when we wake up. While
in bed we must not cover our heads. If we do, our lungs (肺) will not get enough fresh air. If we open our
windows at night we can have plenty of fresh air. Cool air is better than warm air. Boys and girls who want
to grow and be strong must get plenty of sleep.
B. playing
C. sleeping
D. waking
B. Cool air
C. Warm air
D. Dry air
B. hungry
C. tired
D. grow
B. Nine hours
C. Ten hours
D. Eeven hours
B. Food
C. Rest
D. Exercise
always prepare before every trip. But what"s the best navigation tool, a Global Positioning System (GPS) or
a good old map and compass? Five of my friends and I hiked through the mountains on a trail I marked. One
team of three carried a GPS, and the other team used a map and compass.
It took the GPS team 3 hours and 11 minutes to get through the whole hike, however, it took the map and
compass team only 2 hours and 49 minutes. The biggest problem the GPS team met was that they lost the
satellite signal (卫星信号) in some places. With no map or compass, they had to walk around until they were
in a place where the signal was good. The map and compass team was able to spot (认出) different landmarks,
compare them to their maps and then use the compass to point them in the right direction.
When I head out on my future hikes, I"m bringing a map, a compass and a GPS to show me the way.
B. know how to use the GPS
C. want to get lost in mountains
D. want to get into the mountains alone
B. went along the same trail
C. had the same problem
D. finished the whole hike at the same time
B. it wasn"t necessary to bring a map and a compass together with a GPS
C. the GPS had some disadvantages in hiking in mountains
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