1、Unit 1 The Amazon rainforest: a natural treasure The Amazon rainforest, the largest rainforest in the world., crosses into eight countries, including Brazil and Peru, and one overseas region of France, all on the South American continent. It covers 1. area of around 6 million square kilometers. It i
2、s named after the Amazon River, 2. is close to 6,400 kilometers in length, 3. (support) many different ecosystems, which give this area the richest biodiversity on the Earth, one tenth known species in the world can be found here. There are 4. (variety) plants in the Amazon rainforest. Of the 390,00
3、0 plant species known to us, over 40,000 can be found there. The forests different levels support an 5. (believe) variety of wildlife. Each level of the forest forms its own little world, home to different kinds of living things. an wihch supporting various unbelievable There are more than 1,300 spe
4、cies of birds and over 400 species of mammals living in this forest. This jaguar is one example. When a jaguar dies, a tiny army of microorganisms helps break 6. its body and return the 7. (nutrient) to the earth. The Amazon rainforest is not only home to numerous species of animals and plants but a
5、lso known as the “lungs of the planet”, because it breathes life 8. the planet by fixing carbon and producing over 20 per cent of all the Earths oxygen.But over the past 50 years, about 17 per cent of the rainforest 9. (disappear) due to human activities.And some species are also in danger of 10. (e
6、xtinct). It is time for us to do something to protect it. down nutrients into has disappeared extinction Unit 2 Natural disasters In Falmont, Alice Brown was giving a lesson to students 1. an earthquake hit the county. The students reacted 2. (proper) they moved under their desks and held on 3. the
7、legs of the desks. When the shaking stopped, Miss Brown signalled the class 4. (exit) the classroom covering their heads with their hands. Luckily, only 5 students were slightly 5. (injure) at Falmont Primary School, despite the current figures of 7 killed and over 200 injured in the disaster area a
8、t large. It was the practice of earthquake safety procedures twice a year 6. helped the students during the earthquake. when properly to to exit injured that On 20 December, the day began as usual, with people 7. (walk), running or simply sitting on the sandy beach. 8. , a 10yearold girl noticed som
9、ething odd. The water was like the bubbles on the top of a beer and coming in and in and in, 9. were signs of an approaching tsunami. She kept asking her parents to talk to a safety officer about the signs and the officer rapidly cleared the beach of people just before the huge waves crashed into th
10、e coast. Thanks to the girl, around 100 people 10. (save) walking However which were saved Unit 3 Internet: a world without frontiers The Internet has the power 1. (connect)people across the world to a single 2. (share) community. We can achieve almost anything online with access to the Internet com
11、e some truly lifechanging advantages. One of the greatest advantages of the Internet lies in the quick and easy access to 3. huge amount of information. The Internet has now become the first place 4. the majority of people turn to for information. Meanwhile, it has also made our lives unbelievably 5
12、. (convenience), with all sorts of goods and services 6. (provide) by ecommerce. Above all else, the Internet helps us establish and maintain social ties. 7. the Internet brings many valuable advantages, 8. (connect) has its problems. We must be aware 9. these problems and be careful to use the Inte
13、rnet properly and responsibly. Only in this way can the Internet be a place of discovery, wonder and 10. (inspire) for everyone. to connect shared a that convenient being connected While/Though/Although of inspiration provided Unit 4 Chinese scientist wins 2015 Nobel Prize Because of her contributio
14、n to the fight against malaria, Tu Youyou has become the first female scientist of the Peoples Republic of China 1. (receive) a Nobel Prize. Born in 1930, in Ningbo, Zhejiang Province, Tu 2. (study) medicine at university in Beijing and acquired a broad knowledge of both traditional Chinese medicine
15、 and Western medicine. In 1969 she became head of a team that intended to find a cure 3. malaria. 4. (inspire) by an over 1,600yearold text about preparing qinghao with cold water, she tried extracting the herb at a low temperature in order not to damage its 5. (effect) part. She finally succeeded i
16、n making a qinghao extract that could treat malaria in mice. 6. , the trials on patients were likely to 7. (postpone) because they did not have sufficient safety data. To speed up the process and ensure its 8. (safe), Tu and her team volunteered to test qinghao extract on 9. (them) first. to receive
17、 studied for Inspired effective However be postphoned safety themselevs The efforts of Tu and her team finally paid off. In November 1972, through trial and error, they successfully discovered qinghaosu, 10. is a key part of many malaria medicines. Tu encouraged scientists to further explore the treasure house of traditional Chinese medicine and raise it to a higher level. which
