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It seems entirely natural to us that there are teams of scientists in universities and (46) _____ institutions around the world, attempting to discover the way the world works. (47) _____, it hasn’t always been that way. Although the scientific method is now four or five hundred years old, the ancient Greeks, for example, believed that they could (48) _____ the cause of natural events just by the power of thought. During the 17th century, more and more people began to realize that they could test their scientific ideas by designing a relevant experiment and seeing what happened. A lot of (49) _____ was made in this way by individual scientists. These men and women often worked alone, carrying out research into many different areas of science, and they often received very little (50) _____ for their hard work. At the start of the 20th century, though, it became clear that science was becoming more complicated and more expensive. The individual scientists disappeared, to be replaced by highly qualified teams of experts. Modern science was born

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In order to deal with our new investment portfolios, we need to acquire ------- computer systems.

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The gallery is given ......... to British art

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It is highly ____ that factories should be moved to the suburbs to reduce the pollution rate in the cities

 How old … she?

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Water is of vital importance to all living things. Without it, all living things will surely die. We also use a great (16)______ of water daily in our homes, in factories, and in power stations. Most of this water is fresh water and it comes to us from reservoirs, rivers and lakes. The Earth's surface is (17)_____ by large areas of water which we call oceans and seas. If you have tasted the water from the sea, you will know that, unlike fresh water, seawater tastes salty. This is due to the (18)_____ of sodium chloride which comes from the land. Rivers carry it to the sea. Although neither salt nor fresh water has any color, the sea often looks blue (19)______ the sunlight. The reason is that sunlight is made up of many colors. Some colors disappear quickly in the sea but blue light bounces back or is reflected, to the surface. This makes the sea look blue. (20)______ , a stormy sky will make the sea look grey

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In the volleyball match last night, Thong Tin FLC ________ defeated Vietinbank by 3-2

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Generic medications are just as ............., and much less expensive.

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How long does it_______ him to walk to his school?

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It is impossible for them to enter the country…….

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People of different countries have quite different life styles. We American are wasteful people, (25) _______ saving. Our grandfathers began this pattern, for nature’s resources seemed so plentiful that no one ever imagined a shortage. Within a few years of the first Virginia settlement, for example, pioneers burned down their houses when they were ready to move to west. They only wanted to have the nails for (26) _______ use. No one ever gave a thought to the priceless hardwoods that went up in smoke. We the people in the United States destroy many things that other peoples save. I (27) _______ this when I was living in Britain. I received a letter from one of England’s largest banks. It was enclosed in a used envelop that had been readdressed to me. Such a practice would be (28) _______ in the United States. American banks, (29) _______ the smallest, always use expensive stationery with the names of all twenty-eight vice-presidents listed on one side of the page

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The survey shows that average journey times have been going ........

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I gave him my number and he promised __________ me

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Richard Nixon had been a lawyer and ....... before he entered politics.

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He was a very _______ person, always laughing and telling jokes

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After ________ over the pros and cons for weeks, she finally quit her job last Friday

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I opened my mouth to apologize, but the words wouldn't ...........

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“Do you know how this machine work?” 

“All you do is just ________ this button and it starts automatically.”

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___ does your father work at that company? Because it's near our house

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You made a commitment to support our project, and now you've gone _____________ your word

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We ___________ a table for four, at nine o'clock