C

In 1901，the citizens of Colorado Springs in the USA decided to collect everyday items and to seal (封住)them in a special box. The box was marked “To be opened after midnight， December 31st，AD 2000”，and was kept in the Colorado College Library.

One hundred years later，on the appointed(约定）day，300 people gathered to watch the opening of the box. Many in the crowd were the descendants(后代)of people who had placed things inside the box.

When the box was opened after midnight，the things inside the box were in very good condition. There were newspapers， photos，diaries，name cards，family trees，books and lots of letters，including one written by Theodore Roosevelt，who became the President of the USA later that year. One of Roosevelt’s friends lived in Colorado Springs at that time.

Many of the letters were written to their descendants. They describe the hopes that the people of 1901 had for the people of the next century. At that time， Colorado Springs had just a few thousand people. Now nearly half a million people live there.

Colorado College Library has scanned the materials and put them on a website. Cecll Muller，whose grandfather had placed a collection of postcards in the box，said that the time capsule was a great treasure. “This is a wonderful educational resource(资源).We can learn so much about our history,” he said. “I never knew my grandfather，but now I feel very close to him. ”

34、According to the passage，“time capsule” means___________.

A. a collection of clocks and watches

B. a machine for travelling through time

C.a collection of items for people to look at in the future

D. a collection of unwanted items

35、Many of the letters in the time capsule talked about___________.

A. the history of the town        B. the people who lived in the town

C. the politics of the USA        D. people’s hopes for the future

36、Cecll Muller says that the time capsule___________.

A. helps him to get to know his grandfather

B. is worth a lot of money

C.brings back his memories of his grandfather

D. helps him to remember his younger days

D

TOKYO，JAPAN—What do you do when you see a cockroach(蜂螂）？ Do you hit it with a newspaper? Do you step on it?

When researchers at Tokyo University see a cockroach，they take the remote control and make the cockroach turn around，run left or right，or go forward. These scientists are changing the cockroaches into robots. Each cockroach has a very small pack that has in it a microprocessor(微处理器).Then researchers can send signals from the remote control to the pack. The signals control the movements of the cockroaches.

Why does anyone want to control a cockroach? “Insects can do many things that people can't，”says Isao Shimoyama，head of robot research at Tokyo University. In a few years， he says，these robot insects will carry very small cameras. They will be able to move through earthquake rubble(瓦砾)to look for people or move under doors to find information about someone.

This may seem strange，but the Japanese government thinks the research is very important. The government is giving the scientists $ 5 million for this research.

First， the researchers breed (培育)hundreds of cockroaches. They use only the American cockroach because it is bigger and stronger than other cockroaches. Then they choose the best cockroaches and remove their wings and antennae(触须).They put small packs where the antennae were. The packs weigh about three grams，or about two times the weight of the cockroaches themselves. “Cockroaches are very strong，”says Ralph Holzer，who is a researcher at Tokyo University. “They can lift 20 times their own weight. ”

With a remote control，the scientists send signals to the packs. When a cockroach gets the signal，it moves. The problem is that the cockroaches don' always move in the right direction.

37、The scientists are changing the cockroaches into robots because___________.

A. they want cockroaches to do things people can' in the future

B. they want to control the movements of the cockroaches

C .they want cockroaches to take photos of the earthquakes

D. they want to send signals to the packs on the cockroaches

38、What can cockroaches do to help people?

A. They can lift 20 times their own weight.

B. They can help people to carry very small cameras.

C .They can breed hundreds of cockroaches.

D. They can search for those people in rubble after an earthquake.

39、Scientists control cockroaches' movements___________.

A. by removing their wings        B. by sending signals from the remote control

C .by using very small cameras        D. by removing their antennae

40、What problem do the researchers meet with?

A. The cockroaches sometimes don' move.

B . The cockroaches sometimes move in the wrong direction.

C . The cockroaches are too big to move through earthquake rubble.

D. The cockroaches can only lift 20 times their own weight.

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