Review of units 1-5Unit 1Useful Expressions1. make predictions 做预测2. free time 空闲时间3. flyto 乘坐飞往4. on a space station 在太空站上5. I disagree. 我不同意.6. fall/be in love with sb. 与sb.相爱7. keep pets 养宠物8. be able to 能够9. predict the future 预测未来10. come true 实现11. see sb. do sth. 看见sb.做某事（的全过程）doing sth. 看见sb.正在做某事（片断）12. help sb. with sth. 帮助某人做某事13. hundreds of 数以百计的14. try to do sth. 尽力做某事15. look like 看上去长的像16. look fo
