1.(教材P31)It has lasted for ten hours and was very frightening.
它持续了10个小时并且非常可怕。
frightening adj.吓人的;可怕的
(1)frightened adj. 惊吓的,受惊的,害怕的
be frightened at 受......惊吓
(2)frighten vt. 使惊吓,害怕
frighten sb./sth. away 将某人/某物吓跑
①The frightening noise set her hair on end.
恐怖的声音使她毛骨悚然。
②Frightened (frighten) children were calling for their mothers.
受惊的孩子们呼喊着妈妈。
③The alarm frightened the burglar away.
警报铃声吓走了窃贼。
2.(教材 P31)Deserts are also created because people cut down trees and dig up grass.
沙漠的产生也是因为人们砍树和铲除草皮造成的。
cut down 砍倒;削减,减少
cut in 插入,插嘴
cut off 切断;使隔绝
cut up 切碎
①Tom has been asked to have the tree cut down.
有人请求汤姆把树砍倒。
②Don't cut_in when others are talking.
别人说话时别插话。
③We were cut_off in the middle of our telephone conversation.
我们在电话里谈话谈了一半就被切断了。
④Please cut the apple up into equal pieces.
请把苹果切成大小相同的块。
3.(教材P32)Scientists have tried many ways to solve this problem and in China, a mass campaign has been started to help solve it.
科学家们已尝试过许多办法解决这个问题,在中国,一场大规模的帮助解决沙尘暴问题的运动已经开始了。