必修四 Unit 2 Working the land（课件+课时作业）-2021高考英语【创新思维】一轮总复习(人教版)

Ⅰ.单句语法填空 1．My mother would rather I focused(focus)more attention on my study. 2．The first man to__support(support)the campaign was the captain. 3．Even if invited(invite)，I won't attend the evening party. 4．Believe it or not，the rich man should be reduced to begging(beg)for a living. 5．I'm not very satisfied with his interpretation of this sentence. 6．With so many people focusing(focus)their eyes on him，he felt very nervous. 7．The girl was confused by his confusing words and she was at a loss what to do next.(confuse) 8．Jerry did not regret giving/having__given(give)the comment but felt that he could have expressed it differently. 9．Without the help of the modern equipment(equip)，these experiments would not be performed smoothly. 10．I regret to__tell(tell)you that your problems are beyond my power.You'll have to turn to some other one，I'm afraid. Ⅱ.单句改错[来源:学.科.网] 1．Costs have been reduced to 20% over the past year.to→by 2．We should take measures to improve that is called the quality of living.that→what 3．The fish is rich with oil，which is good for people who have heart trouble.with→in 4．If you keep your attention focusing on learning，you will reach your goal of becoming a successful student.focusing→focused 5．As he was getting onto the stage，Dan closed his eyes and took a deep breath to rid him of his fears.him→himself Ⅲ.阅读理解 A new study shows that rising levels of planet­warming gases may reduce important nutrients(营养物)in food crops. Researchers studied the effects of carbon dioxide on rice.In the experiment，scientists grew 18 kinds of rice in fields in China and Japan.They set carbon dioxide levels to what scientists are predicting for our planet by the end of the century.Rice grown under high carbon dioxide conditions had，on average，13 to 30 percent lower levels of four B vitamins and 10 percent less protein(蛋白质)．The crops also had 8 percent less iron and 5 percent less zinc than rice grown under normal conditions.However，vitamin E levels increased by about 13 p