题目内容
（请给出正确答案）
We have made ______ attempts to solve the problem，but so far our efforts have been unsuccessful．
我们作了许多尝试来解决这个难题，但是到目前为止，我们的努力还没有成功。
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更多“We have made ______ attempts t…”相关的问题
Without computers, we ______ the tremendous medical advancement in the last few decades.
A．would not make
B．will not have made
C．could not make
D．couldn't have made
A.what do we call
B.what we call
C.we call it
D.we call what
A．far more greater
B．more greater
C．far greater
D．great
Once our goals are drawn up, ______.
A．we should stick to them until we complete them
B．we may change our goals as we have new ideas and opportunities
C．we had better wait for the exciting news of success
D．we have made great decision
If people look for anything long enough without finding it, the question naturally arises【36】the thing is really there to find. You have seen a picture of an animal with a lion's head, a goat's body, and a serpent's tail—and maybe an eagle's wings for good【37】. There is plenty of evidence that each part of this animal【38】—but there is no【39】evidence that the parts ever occur in this combination. It is at least conceivable that the seekers after "truth" have made a similar mistake and invented an【40】combination.
(31)
A．regarded
B．considered
C．pondered
D．referred
The houses we live in are very __1__. They keep us from being cold in the winter and hot in the summer. In the winter they keep out of the snow. They also keep out the wind. Even if it is blowing outside, we are nice and warm inside. In the summer houses keep the hot sun from us.When it rains, they keep us from getting wet.Houses are also places __2__ we feel safe. People can’ t get at us or our things. Houses give us a place to be together with our families and friends. Mothers and fathers __3__ their children there. The children play there. The family eat and sleep under the same roof.Houses are different in many ways. They are made of different things.Some houses are made of wood. Some are made of stones. Sometimes more than one thing is used to make a house.Houses come in different __4__. Some houses have only one room. Some houses have more than one room. Big buildings found in cities have a great many rooms. They hold many families. The rooms in which each family lives are called an apartment. Houses are different in the ways they are __5__. Houses in tropic countries can be lightly built. In places where it rains much of the time, houses must keep out the water.take care（ “注意”，“当心”，“留心”）
（1）__1__
A.expensive
B.important
C.huge
Once upon a time (not so very long ago, either!) industrial goods were made to last forever. If you bought a ear or a stove, it was a once-in-a-lifetime investment(投资). You paid good money for it, and you took care of it. Nowadays industry has persuaded us that products shouldn't last a long time. It's cheaper to throw them away than it is to repair them. This has led directly to the "throw-away society" which is a tremendous waste of the earth's resources.
Just think of the cars that are traded in daily, just because they are out of style. Think of the expensive packaging material that is thrown away every time a new object is bought. And we consumers have to pay for that material! Our industrial society has turned us into spoiled children. This wastefulness has got ten us into the mess (困境) we are in now. When we have no resources left, then we'll start to take care of what we have. But why can't we act before this happens？ Why can't we go back to being a society in which the prevention of waste is a virtue？
Products used to be made to last ______.
A．for at least five years
B．for ten years
C．for as long as you take good care of them
D．for your whole life
Is there something as truth？ For a good many centuries "the search for truth" has been (31) the noblest activity of the human mind, but the seekers after truth have come to such (32) conclusions that it often seems that very little progress has been made. (33) , there are many people who reel that we are actually going backward. They (34) , often contemptuously, that we have accumulated more "knowledge" than our ancestors, but they think we are farther from the truth than ever, or even that we have (35) the truth that we once possessed. If people look for anything long enough without finding it, the question naturally arises (36) the thing is really there to find. You have seen a picture of an animal with a lion's head, a goat's body, and a serpent's tail--and maybe an eagle's wings for good (37) There is plenty of evidence that each part of this animal (38) --but there is no (39) evidence that the parts ever occur in this combination. It is at least conceivable that the seekers after "truth" have made a similar mistake and invented an (40) combination.A.regardedB.consideredC.ponderedD.referred
Her love and devotion for my brother and me made our lack of material possessions seem insignificant. Even today, if I were given a choice between having love at home and wealth, I would want it just the way I had it. I grew up poor in material things but rich in love.
Since my father was never around long enough to teach me physical things or to play games with me, I didn't succeed in any competitive sport. My mother did her best as a substitute, throwing a ball with me in the lot(空地) behind our house, but it wasn't the same. She was too protective of me, and I didn't have enough confidence in my own abilities to really try anything physically demanding.
The story suggests that the author is______his mother.
A．proud of
B．worried about
C．pitiful for
D．concerned about
