第二部分 选修七 Unit 21 Human Biology.ppt

参考答案： Three robbers were believed to have robbed a bank of a large fortune yesterday, which happened soon after several women were robbed. The police immediately blocked the main roads and prohibited the suspect cars from passing. The authorities said that such crimes were hard to tolerate and must be wiped out at all costs. At present, the police are seeking the information about the cases and urge the criminals to submit to the police. Meanwhile, women are advised not to postpone going home after work and go out alone at night. 点击进入一卷冲关的课后练案 * make * * make * B：单项填空 ④Five hundred years ago the plague (黑死病)________ almost all the population of the island. A．wiped down B．wiped off C．wiped out D．wiped up 解析：句意：五百年前，黑死病几乎毁灭了岛上的所有人口。wipe out“彻底毁灭，根除”，符合句意。 答案：C 1．Many contemporary amateur athletes would_have_broken world records if they had_taken part in the first Olympic Games. 许多当代的业余运动员如果参加了首届奥运会，他们会打破很多项世界纪录的。 本句含有if引导的虚拟条件句。虚拟条件句中主句和从句谓语动词构成形式如下： 时间 条件句谓语动词 主句谓语动词 现在 动词过去式/were would/should/might/could＋动词原形 过去 had done would/could/should/might＋have done 将来 should do/were to do/动词的过去式 would/should/might/could＋动词原形 If I had followed his advice, I would not have made a mistake. 如果我听从他的建议的话，我就不会犯错了。 If I were you, I would invite him to the party. 如果我是你的话，我会邀请他参加聚会。 What would happen if the earth should stop turning tomorrow? 万一地球明天停止运转，会出现什么情况呢？ [点睛]　(1)省略倒装 当虚拟条件句中有were, had, should时，可省略if从句用倒装结构。 Should it snow tomorrow, we wouldnt drive out. 万一明天下雪，我们就不开车出去了。 (2)错综时间条件句 虚拟条件句和主句动作如发生的时间不一致，主句和从句的谓 语要根据各自所指的不同时间选用适当的虚拟语气形式，这种 句子叫做错综时间条件句。 You wouldnt find it so hard to write the composition now if you had observed life carefully. 你要是以前认真观察生活的话，你现在就不会觉得作文难写了。 If I were you, I would have chosen to take a job. 如果我是你，我当时就会选择参加工作。 (3)含蓄条件句 有些句子虽不含条件从句，但意思和条件隐含在介词短语、并列句等里面，这种句子称为含蓄条件句。 But for your advice, I would have lost the good chance for me. 要不是你的建议，我当时就丢了这个好机会了。 I might have given you more help, but I was too busy. 我本可以多帮你一些的，但当时我太忙了。 [多维演练] A：用所给词