Ⅰ. 1. set up 2. give out 3. think up, clean up 4. set off  5. hanging out  

　　6. fallen into   7. In this way    8. April Fool’s Day 9. looking forward to

Ⅱ. 1. showed up 2. shook hands 3. keep out 4. write, down  5. is similar to  

　　6. put off   7. dropped by   8. By the time; run off   9. takes after  

　　10. broke down

Ⅲ. 1. be off;  go for walks    2. Thanks to his help  3. care for other people  

　  4. tea was invented by accident      5. hand in your homework on time

　　6. As we all know   7. So far; has cleaned out   8. is aimed at  

　　9. are used for giving

Ⅳ. 1. I have run out of money  2. Who put up these signs

　　3. Don’t make so much noise   4. knocked into his teacher

　　5. dress up for the party   6. The music reminds me of   

　　7. are used to staying up late   8. took your math book by mistake

　　9. learn it by myself    10. to fix it up for me