课时作业6 Unit 5 Section Ⅱ Lesson 2 & Lesson 3（Word练习）-【优化指导】2022-2023学年新教材高中英语必修第二册（北师大版2019）

课时作业(6)　A卷　基础巩固 Ⅰ．单句语法填空 1．In the past，studying abroad was a distant (distance) dream for most people. 2．They trapped her into telling (tell) where the gift was hidden. 3．The new rules will come into operation (operate) from next week. 4．Take a deep breath (breathe)，and then you may feel relaxed. 5．Petrol is running out,_so I have to stop at the next filling station. 6．With our knowledge based (base) on practice，we can make great contributions to our society. 7．If you go on working like that，you will break down sooner or later. 8．He carried on the task left by his comrades. 9．I paid a visit to one of my old friends on my way to Boston. 10．They are attempting to climb (climb) the steepest part of the mountain. Ⅱ．完成句子 1．What worries the public is whether ways will be found to stop pollution. 令民众担心的事是能否找到阻止污染的方法。 2．Our government is trying to take measures to prevent and control pollution. 我们的国家正试图采取措施防止和控制污染。 3．Miss Guo wants her students to conduct a survey for the school. 郭老师想让她的学生为学校开展一次调查。 4．He was out of breath after running. 他跑完后，上气不接下气。 5．In the yard stands a tall tree. 院子里有一棵大树。 Ⅲ．阅读理解 In one of the world’s most forbidding environments，polar bears spend their summers roaming (漫步) the Arctic on large pieces of floating ice.They drift(漂移) for hundreds of miles，finding mates，hunting for seals，and fatting themselves up for the winter.Without the floating ice，the world’s largest bears could not survive.Yet at this moment，the polar bears’ Arctic habitat (栖息地) is melting away under it because of global warming. Over the past three decades，more than a million square miles of floating ice has disappeared.Scientists predict that，if the current rate of global warming continues，most，if not all，of the bears’ floating ice will be gone by 2100．As a result，the world’s polar bears could face global dying out by the end of this century. Already，the ice on the southern edge of the polar bears’ habitat is melting about three weeks earlier than in the past.The loss of those key