【正文】
How fun it is to go swimming in summer! 5. Some scientists think it came after an unexpected incident when a huge rock from space hit the earth and put too much dust into the air. Others think the earth got too hot for the dinosaurs to live on any more. 有些科學(xué)家認(rèn)為恐龍的滅絕是發(fā)生在一件意外事故之后,當(dāng)時(shí)宇宙間一塊巨石擊中地球因而在空氣中揚(yáng)起太多的塵土。 Exercise: 有人認(rèn)為壓力帶走了他們的快樂和自由。 Some students think that using dictionary helps them (to) enlarge their vocabulary as well as learn genuine English. Others believe that it is a waste of time to often look up words. 五、 Exercise: Part Ⅰ : 1) have been protecting / have protected, protection, endangered 2) was threatened, threat 3) power, powerful 4) expected, Unexpectedly 5) affected, effect 6) succeeded, success 7) employer, employee 8) lose, loss 9) has decreased, is increasing 10) importance, important Part Ⅱ : Translation 1 In summer, it is very important to protect our eyes from the sunlight. 2 I suggest that he should accept the job without h