北师大版（2019）必修 第二册 Unit 5 Humans and nature训练（共9份，含答案）

UNIT 5　训练1　Topic Talk (分值：59.5分) Ⅰ.单词拼写(每小题1.5分，共15分) 1．The _____(鹰) is a symbol of strength and courage in literature. 2．Though the park is small，it is home to deer，foxes，and other _____. 3．What gas do you think is the first suspect in causing the _____ effect 4．As far as I’m concerned，the natural _____ there is worthwhile to visit. 5．In the bus accident，the father was killed，but the daughter was found _____. 6．Millions of people are threatened with starvation as a result of _____(旱灾) and poor harvests. 7．Emitting much CO2 into the atmosphere has an impact on _____ and the balance of ecology. 8．According to the _____(讲座)，we are overusing natural resources and doing harm to our environment. 9．The region has gone through some heavy _____(灾难)，which will have a big impact on its economy. 10．Nowadays，a growing number of people tend to leave the _____(拥挤的) big cities for the quieter life in the countryside. Ⅱ.单句语法填空 (每小题1.5分，共12分) 1．_____(million) of people have lost their home after the terrible earthquake. 2．Never make any comment _____ a woman’s hairstyle，or you will regret greatly. 3．Large dams have done great harm to Siberia’s delicate _____(ecology) balance. 4．Ash from a volcanic _____(erupt) in Iceland has begun disrupting air traffic in Britain. 5．Neighbors were frightened and _____(shock) that such an attack could happen in their area. 6．After many attempts，we hold the belief that on no account should we give up _____ the face of difficulties. 7．The pavilion situated on the hillside is _____(crowd) with tourists who are enjoying the beautiful landscape. 8．I didn’t think he would turn his back _____ his brother；they had relied on each other in life since childhood. Ⅲ.阅读理解(每小题2.5分，共20分) A Nature is like the mechanism in an enormous clock.Everything is neatly arranged and interconnected.Every individual has its place and its function.Take the wolf for example.As meat-eaters，wolves regulate the number of plant-eaters so that they do not multiply too rapidly.All animals and plants are held in a delicate balance. The wolves remind me of a story from my childhood when my grandfather gave me an old clock.The first thing I did was take the clock apart to find out how it worked.Even though I was convinced that I knew how to put it back together in working order，I couldn’t do it.After I rebuilt it，there were a few cogs(轮齿) left over and a grandfather who was not in the best of moods.In the wild，wolves play the role of such cogs.If we remove them，not only do the enemies of sheep and cattle disappear，but the mechanism of nature also begins to run differently，so differently that rivers change course and many local bird species die out. And things can also go wrong when a species is added.For example，the introduction of a non-native fish leads to a massive reduction in the local deer population.Because of a fish The earth’s ecosystems，it seems，are a bit t ... ...