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The scientists are working on a drug capable of arresting the spread of cancerous cells

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Life is sometimes very harsh for ____ families in big cities.

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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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We decided to buy the house ______ we didn’t really have enough money

Choose the best option (A, B, c or D) to complete these sentences.

My best friend, Hanh,is ................... She talks all the time.

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It came as no surprise that Thailand ended the latest SEA Games at the top of medals ____

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Kitchen appliances called blenders became ............. in the 1930s, when Stephen J. Poplawski developed a machine that excelled at making his favorite drink.

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He often …………………… a train to work.

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When I went to get the tickets, I realized I ____ any money

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Due to an ------- in need for organic foods, distributors are racing to make contracts with local organic farmers.

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No sooner ______ than the class started

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Those who have the lowest levels of skill and the weakest capacity for constant updating will find themselves uncompetitive, unemployed, and highly dependent upon others

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Tony and Bob are talking in their classroom.
- Tony: “We are buying Lily a graduation present.”
- Bob: “ _______ ”

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We do expect to meet your new manager - you've been _______ his praises ever since he arrived

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Having good friends who love and support you ____ who you are is really important to your happiness

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She cried because they made fun ______________ her.

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The store ran _____________ bottled water and canned food after the government issued the hurricane warning

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Before __________ to bed, remember to turn off the lights

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______ did she go yesterday morning? - She went to the supermarket

My girlfriend is a ..........

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I went _______________ cycling to work at the beginning of the summer, and I haven't been healthier!