1、Lesson 19 必背单词1. technology n. 技术 technical adj. 技术的2. keyboard n. 键盘3. industry n. 工业；企业；行业 agriculture n. 农业 business n. 商业 必背短语4. chat with sb. 和某人聊天5. plan to do sth. 计划做某事 6. more than 多于；超过 over 超过；多于Lesson 20必背单词1. enter v. 输入；进入 enter into sth. 开始讨论； 着手处理 entrance n. 入口2. key n. 关键； 钥匙 the k
2、ey to 的关键；的钥匙3. search n.& v. 搜索；查找 in search of 寻找； 搜寻 search for 查找；搜索4. depend v. 依靠；取决于 depend on 依靠；取决于；根据 dependent adj. 依靠的；依赖的 dependence n. 依靠；依赖5. hide v. (hid/ hidden) 隐藏；躲避必背短语6. one of .之一 必背句子7. Though the meaning of Easter has changed over time, the rabbits and eggs remain. 虽然随着时间的流逝复
3、活节的含义已经改变了，但是兔子和彩蛋保留了下来。Lesson 21 必背单词1. appear v. 出现；呈现；来到 disappear v. 消失2. modern adj. 现代的；新式的3. electronic adj. 电子的4. sell v. ( sold/ sold ) 卖；出售 sell sb. sth.= sell sth. to sb. 把某物卖给某人 必背短语5. pass on 传递；前进pass on sth. to sb. = pass sth. on to sb. 把某物传递给某人6. no matter what 无论什么7. by hand 用手；手工8.
4、 keep on 继续 必背句子9. Later, people learned how to write and make paper. 后来，人们学会了怎样写字和造纸。10. It took a long time to write just one book! 仅写一本书就要花费很长一段时间！ Lesson 22 必背单词1. receive v. 收到；接到 必背短语2. come true 实现 必背句子3. She asked people if they could help her grandma see the world through pictures. 她请求人们是否他
5、们能通过照片来帮助她祖母看世界。Lesson 23 必背单词1. advantage n. 优势；有利条件；有利因素 take advantage of. 利用 2. simple adj. 简单的；简明的 simply adv. 简单地；仅仅3. coin n. 硬币4. cause v. 造成；引起5. less adj. & adv.( little 的比较级) 更少的( 地)； 更小的( 地)n. 较少量；较小的部分 less than 少于6. steal v. 偷盗；窃取 stole (过去式) stolen (过去分词) 必背短语7. in seconds 在很短的时间内8. g
6、et sth. done 使某事被做 9. far away 遥远 10. stay in touch 保持联系11. take up 占据；占用；开始从事；接受( 提议) 必背句子12. Spending too much time online is harmful to peoples health. 花太多的时间上网对人们的健康有害。13. Aside from that, some people attack the web or use the Internet to steal others personal information, even banking informati
7、on. 除了那之外，一些人侵袭网络，或用互联网偷取别人的个人信息，甚至银行信息。14. But every coin has two sides. 但是每个硬币都有两面/ 每件事都有两面性。Lesson 24 必背短语1. set up 安排 必背句子2. It would be a lot of fun to see each other as we talk! 当我们说话时看到彼此将会很有趣！ 3. Can we set up a time to go online together? 我们能约定一个时间一起上网吗？ 单元必背语法1. If we want to have a meeting, I can send the invitation online. 如果我们想要开会，我可以在线发邀请。2. If I work hard this evening, I will complete my research. 如果今天晚上努力工作的话，我将完成我的研究。3. If Grandma could not travel herself, maybe there was another way. 如果奶奶不能自己去旅游的话，也许有另一种方式。3
