Unit1单元知识点总结重点词组:1. look into 调查 2. insist on/upon sth/doing 坚持做,坚决做3. belong to 属于 4. get /be lost ; be missing 迷路,丢失5. do with 处理;对付 6. in search of ;in the/ones search for寻找7. be used to do sth. 被用来做某事 8. be used to doing sth. 习惯于做某事9. be made into . . 被制成; be made of /from用制成(看得见原材料/看不见原材料)be made for 为