Is there ______ information about water in this passage?

A．many         B．much         C．a(chǎn) number of               D．a(chǎn) good many

    We have always been interested in the moon．2000 years ago people a1ready knew it moved around the earth and where it would be in the sky at different times of the year．At that time，everything about the moon was learned by watching it carefully in the sky．

    When scientists could use telescopes(望遠(yuǎn)鏡)to study the moon more closely，their ideas began to change．They could see the moon was made of rocks．Most scientists thought moon rocks would be different from those on Earth．This was because they believed the moon had once been a planet(行星)that had been caught in the earth’s gravity(引力)millions of years earlier

    In 1969 moon rocks were finally brought to the earth and studied．Much to their surprise，scientists found that，except for water，the moon and the earth were made of the same thing．Once again new ideas were needed for this new information．

    After years of study，most scientists now think that the moon was once part of Earth．They believe very early in its history，maybe 4 million years ago，something about the size of Mars(火星)hit Earth．This sent billions of rocks into space around our planet．These rocks slowly joined together and after many years became the moon．

    In the future，even though our ideas about the moon may change again，we will still be interested in it．

1．Now，we’re sure       

    A．Moon rocks are quite different from those on Earth．

    B．Moon was once a part of Earth．

    C．Moon moves around Earth and it's the only satellite of Earth．

D．Moon was once a planet caught in Earth’s gravity．

2．In 1969 there is a big event，that is       ．

    A．humans found no water in Moon rocks

    B．scientists made out a modern spaceship

    C．scientists invented an advanced telescope

D，humans left their footprints on Moon

3．What does the writer want to tell us in the passage?

    A．Why people are interested in the moon．

    B．How ideas about the moon have changed over time．

    C．Where the moon came from in the past．

    D．That people have finally learned the truth about the moon．

4．Before l 969 most scientists thought the moon was        ．

    A．part of the earth billions of years earlier

    B．older than the earth

    C．a(chǎn) planet caught by the earth’s gravity

    D．made of the same things as the earth

5．From this passage we can learn that          ．

    A．scientists in the past were not clever

    B．the earth was once part of the moon

    C．new information brings new ideas

    D．we now know everything about the moon

Dolphins are our friends. They can use tools to solve problems although they don't have hands.   For example, scientists have ever found that a dolphin can make a shy eel(鰻魚(yú)) come out of its hole with a dead fish.
Dolphins use different sounds to exchange information with each other. Scientists in Hawaii have developed a sign language to give instructions to dolphins, and the results are amazing. They find that dolphins not only understand the meaning of individual (個(gè)別的) words, but also understand the importance of word order in a sentence.
Most animals enjoy playing — but dolphins seem to like making their games as challenging as possible. On a beautiful day in 1997, scientists at a beach watched a little dog going into the sea and swimming towards the dolphins. To their surprise, the dolphins came up to the dog and then started throwing it into the air. The dog seemed to enjoy the "game" and continued playing with the dolphins for more than an hour.
Dolphins live in a very different world from ours, but they are very good at our "IQ tests” . For example, they will jump out of the water when they hear a whistle (口哨) noise. They do this because they will get a fish as a prize.
There is still much to learn about these cute problem-solvers, but it is certain that watching a dolphin show is fun.
根據(jù)短文內(nèi)容，選擇最佳答案。（5分）
【小題1】 What can a dolphin use to make an eel come out of its hole?