电大英语II(2)历届试题及答案分类.doc

1、第三部分 完形填空Genetic EngineeringMany people are unaware that a lot of the foods they eat every day, such as bread ham and cheese, have been altered by using new technology. Food can be changed. It can be made to taste different or to look different carrots can be made to taste of chocolate and apples ca

2、n be made redder. Some food that appears the same has been scientifically improved, for example, fish can be made to grow faster. Should we be pleased or worried? Will new technology bring benefits, or is it about to go out of control?Genetically engineered foods are produced by taking genetic mater

3、ial from one species and transferring it to another. For example, an antifreeze gene which appears naturally in Arctic fish has been introduced into tomatoes and strawberries so that they dont freeze in cold weather; a human gene has been introduced into pigs to make them grow more quickly. Some cla

4、im great advantages. They point out that crops can be made stronger and more disease resistant, so pesticides can be reduced. They also maintain that food can be made more nutritious or that the fat content can be reduced to make it healthier.Scientists are working hard to develop better aerials for

5、 mobile phones, a spokesman for Phikia Phones said today. It really irritates users when they lose the signal in the middle of a call, so we are developing new aerials that will enable users to receive stronger signals. Many users reported that when they were travelling, the signal was often lost, s

6、aid the spokesman. The new aerals are designed to avoid losing the signal by receiving the message on a wider range of radio frequencies. We have learnt that this is a major concern for phone users said the spokesman. The new phones have a flexible external aerial, which users will have to get used

7、to touching their ear or head. The aerials - make the phones able to pick up a wider range of signals. The company spokesman insisted that _ this was not a potential danger “Every _ safety regulation has been followed”, he told our reporter. “If Id had one of these phones this morning, I wouldnt hav

8、e missed my train coming here”, joked the spokesman. The biggest adventure I ve ever had was trekking in Thailand. We hired a guide (16) to take us to a village in the jungle. We didnt know that he (17) had never been there before. (18) Unless we reached the village, we wouldnt be able to find somew

9、here to sleep, (19) so we wanted to get there in about 8 hours. After two hours we all realized we were lost. The (20) further we walked, the more confused we became. Luckily after a further 4 hours we met some hunters. They didnt speak the same language as our guide, but we were able to (21) get ac

10、ross that we were lost. They (22) redirected us towards the village. It was after dark when we arrived there. We had been walking (23) for over 14 hours and we were (24) absolutely exhausted. We had been very lucky; if we (25) hadnt met the hunters, we would have had to sleep in the jungle.I was tra

11、velling alone in Western Australia last year, and one day i set off to climb a high peak in that area. Although in the summer there are many tourists, 1 was there out of season because there werent any tour groups. Soon after I reached the top, it began to drizzle and the fog came down . Very soon,

12、it was so thick that path. 1 take my phone with me everywhere because you never know when you will need it.Eventually I called my dad, who was 9,000 miles away in the UK. He told me to phone the local emergency services, but I felt so stupid that I didnt want to. Luckily , my dad realised this and m

13、ade up his mind to call them himself. The rescuers called me on mobile to find out exactly where I was, but unfortunately the battery ran out after five seconds. I lay down under a rock and waited-it was nearly night time and I was cold and wet. Just as they were about to call off the search for the

14、 night, they found me. Fortunately one rescuer had said Lets try for just five more minutes. If they had given up, I would have died.Genetic EngineeringMany people are unaware that a lot of the foods they eat every day, such as bread, ham and cheese, have been altered by using new technology. Food c

15、an be changed. It can be made to taste different or to look different - carrots can be made to taste of chocolate and apples can be made redder . Some food that appears the same has been scientifically improved, for example, fish can be made to grow faster. Should we be pleased or worried? Will new

16、technology bring benefits, or is it about to go out of control? Genetically engineered foods are produced by taking generic material from one species and transferring it to another. For example, an antifreeze gene which appears naturally in Arctic fish has been introduced into tomatoes and strawberries _ so that _ they don