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Most people think of computers as very modern inventions, products of our new technological age. But actually the idea for a computer had been worked out over two centuries ago by a man (39) _____ Charles Babbage. Babbage was bom in 1791 and grew up to be a brilliant mathematician. He drew up plans for several calculating machines which he called "engines". But despite the fact that he (40)_____building some of these, he never finished any of them. Over the years, people have argued (41)_____his machines would ever work. Recently, however, the Science Museum in London has finished building(42)_____engine based on one of Babbage's designs. (43)_____has taken six years to complete and more than four thousand parts have been specially made. Whether it works or not, the machine will be on show at a special exhibition in the Science Museum to remind people of Babbage's work

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My watch is slow and_______ is hers

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I called _________ to my best friend when I saw her walking down the street, but she had headphones on and couldn't hear me

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After having a poor performance in the mid-term test, I decided to put my shoulder to the wheel to achieve better results in the final test

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Look at these photos. They ________ in Brazil or Columbia. Certainly not in Cuba

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Your music is very ____. Can't you just stop it?

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When we went to Boston, we only had a couple of hours to look ____________

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My cousin and I ____ on the computer when there ____ a power cut

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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 front of the house. He wants it to have a nice ________

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Cartoon films have very few limits. If you can draw something, you can (34) ________ it move on the cinema screen. The use of new ideas and advanced computer programs means that cartoons are becoming exciting again for people of all ages. By the end of the 1970s, the cinema world had decided that cartoons were only for children. But soon afterward one or two directors had some original new ideas. They proved that it was possible to make films in (35) ________ both adults and children could share the fun. (36) ________ , not every cartoon film was (37)________ . The Black Cauldron, for example, failed, mainly because it was too frightening for children and too childish for adults. Directors learnt from this (38) ________ , and the film companies began to make large amounts of money again

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If you need anything, don't hesitate _________ me

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Of all high school courses, mathematics _____ to be difficult

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These records should be ......... to the Registrar at the end of every financial year

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The monitors were assigned to ______________ notes for the meeting.

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His willpower helped him _____________ through all obstacles.

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Although he mentions his childhood in the book, he never ........ it in much detail

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She'd save money if she bought that old jeans,______?

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Were my grandfather alive, he ____ learning something new. He was really a studious.

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If you .............................. any money, I’d give you some

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As he made no ______ to our quarrel, I assumed he had forgiven me