Unit 4 Reading 知识点整理及练习 2020-2021学年牛津译林版英语九年级下册讲义(含答案)

9BU4 Reading 【知识梳理1】Some people believe that humans could live on the planet Mars by the year 2100. (P52)有些人相信到2100年人类可以在火星上生活。 1.planet，名词，意为“行星”。行星是围绕恒星(star)旋转的天体，卫星(satellite)是围绕行星旋转的天体。 The new planet is about ten times the size of the earth. 这个新发现的行星大约是地球大小的10倍。 2.by the year 2100是一个时间状语，可在句中作插入语，也可以放在句子末尾，意为“到2100年”。 (1)by+现在的时间，用于现在完成时 By now more than 100 students in my school have joined us. 到现在为止，我们学校有100多名学生加入了我们的行列。 (2)by+将来的时间，用于一般将来时 I'll plan to get you a draft of the paper by next Friday. 我打算下星期五之前给你拿一份论文草稿。 (3)by+过去的时间，用于过去完成时 By the end of last term, I had learnt 3000 words. 到上个学期末，我已经学了3000个单词。 [经典例题] (1)__________ the end of the holiday I had spent all my money. A. By B. At C. In D. Till 答案：A 【知识梳理2】Our own planet, the Earth, is becoming more and more crowded and polluted because of the rapid increase in population.（P52） 我们自己的星球，地球，因为人口的快速增长正在变得越来越拥挤，污染越来越严重。 1.more and more，副词性短语，意为“越来越”；也可用于形容词性短语，意为“越来越多的” She became more and more talkative as