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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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Many think that trading stocks ------- an excellent way for investors to make profits

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Access to the business lounge is limited to those who have ------- a membership card or their member identification badge with them

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When summer comes and the sun appears, it’s good to have a hat. Many people have traditionally (30) _____ for the panama hat. Stylish, light and cool on the head, these palm leaf hats are (31) _____ enough to roll up and put in a pocket or bag. Nowadays panamas can be found in fashionable shops all over the world, sometimes at exorbitant price. However, the hat itself originated in rather humble surroundings in the jungles of South America. In a long tradition (32) _____ was haned down from generation to generation, the palm leaves are gathered by the men and the hats are woven by the women. It can take up to 12 palm leaves to make a top quality hat. Each leaf is split up to 25 times to obtain a straw that is fine enough to be woven into a hat. The women’s job is dictated by the weather and visibility: there must be enough light for them to see the fine straw, but the air must be moist enough for it to (33) _____ flexible. This means that the women can usually only work in the early morning. (34) _____ panama hats are expensive, back in the villages the craftsmen and women are struggling to keep the tradition alive and often receive only a fraction of the price you pay in the shops

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There is not much time left, so tell me about it ____

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We _______ for going home when it began to rain

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She __________ herself as an old beggar to enter Tibet

Choose the answer A, B, C or D to complete the sentence.  Hai  ________ a glass of lemonade before breakfast.

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They refuse ____ out on trips if it's too hot

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He said______ money from me again

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When do you .... for Easter?

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He usually ________ a taxi to the railway station

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He’s a …….and so he always votes for the Labour Party

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He says his father will go to a (an) _________meeting in London tomorrow

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Due to the foot-and-mouth pandemic, the company was forced to reappraise its strategy

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As an ASEAN member, Vietnam has actively participated in the group's programs and has also created new ____ and cooperation mechanisms

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He ______ on the phone for hours

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When he ______all the letters, he took them to the post office

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 _________? - From Vietnam.

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You must be depressed when seeing this scene,______?

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The earth spins on its axis and ................... 23 hours, 56 minutes and 4.09 seconds for one complete rotation.