I expect you’ve already done it,_____ the manager asked you to give him a ring this afternoon.

A. but　　 B. and　　 C. though　　 D. so

The old lady can’t hope to _______ her cold in a few days.

A. get away   B. get off     C. get out     D. get over

What you said sounded 　　　　,but I don’t quite agree with you.

A.having reason　　 B.like reasonable?

C.reasonable 　　　 D.a reason

A powerful earthquake has killed 　　 people in southeast Iran(伊朗)and flattened the historic city of Bam.

A、tens thousand　　 B、tens of thousands of　　

C、ten thousand of　　 D、tens of thousands

Who is better at predicting earthquakes, animals or scientists with instruments? Evidence collected so far suggests that an ordinary animal—a dog, a horse, a pig—may give as reliable a warning of an_impending_earthquake as scientists.

In 1970, 200 instruments failed to predict a California earthquake that shook buildings in San Francisco, 78 miles away. But in 1974, several months before a big earthquake in China, pigs climbed the walls, hens would not roost (栖息), trained dogs did not obey commands and farmyard geese refused to fly. The Chinese scientists paid attention to these and other signs, they educated people before the earthquake struck there and saved a hundred thousand lives.

Many nations now have animals?warning centers to try to learn the animal sense so that instruments can be built to detect the same signal.

1．This passage mainly tells us ________.

A．about the big earthquake in San Francisco

B．that animals can predict earthquakes

C．that animals are better at predicting earthquakes than scientists

D．that some of the animals are clever than human beings

2．The underlined words “an impending earthquake” mean an earthquake ________.

A．that will take place very soon

B．that has just taken place

C．that will not take place

D．that will take place in a very long time

3．In 1974, many people's lives were saved in the earthquake because ________.

A．animals climbed the walls or did not obey orders

B．people knew the correct time of the earthquake

C．scientists knew an earthquake would come and people were well prepared for it

D．scientists prevented the earthquake from taking place

4．Now many countries want to predict earthquakes better ________.

A．with the help of animals

B．all by themselves

C．than animals

D．without animals

One of the major reasons the reef is so fascinating to scientists and tourists is its infinite variety. They come in various shapes and sizes, ranging from more than a few thousand meters in area to over one hundred and twenty square kilometers. Some of the very outer reefs are up to expose themselves while others remain fully submerged. The beauty of the reefs can only be truly appreciated from an aerial view.

About two thousand eight hundred species of fish are known to live in the reef region. It could take many years for scientists to come up with a complete list of all the plants and animals found on any one reef. Many species are still to be identified and named, showing a staggering diversity of life.

Coral reefs start out small and grow about half an inch a year. If undisturbed by man, however, they can grow to be quite big. The Great Barrier Reef off the northeast coast of Australia is one good example! Reefs grow best in sunny, shallow, clear water. They rarely grow deeper than forty meters and they prefer salt water. The appropriate temperatures and salinities are most often found in the tropics.

Coral reefs are important because they provide protection and shelter for many different species of fish. Without coral reefs, these fish are left homeless with nowhere to live or to have their babies. Not only do these fish increase the diversity of our world but also reef fish and mollusks feed between thirty and forty million people every year. They also make beautiful pets and the money made by catching and selling these animals provides many people with an income to feed their families.

Coral are also very important in controlling how much carbon dioxide is in the ocean. Without coral, the amount of carbon dioxide in the water would rise drastically and that would affect all living things on Earth.

Lastly, coral reefs are very important because they protect the coasts from strong currents and waves by slowing down the water before it gets to the shore. That is why they are called barrier reefs. They provide a barrier between the ocean and the shore.　

1. The vehicles one must take to be able to see the full extent of the reefs might be _______________________.

2. From the passage, write the phrase that means that there are a great variety of plants and animals in the ocean. ____________________________

3. Why do you think reefs require clear and shallow water to grow?

They require clear and shallow water so that __________________________.

4. Explain why the coral reefs are also called barrier reefs.

______________________________________________________________________________.

- Alice, why didn't you come yesterday?
    - I , but I had an unexpected visitor.
    A. had   B. would   C. was going to   D. did

The single invention of the computer _______ many new professions.

　 A. gave a birth to　 　B. gave births to　 　　C. gave birth to 　　 D. gave birth for

增加生产会继而增加利润。（in turn;lead to）