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ch out 2. put up 3. no one 4. reach out 5. saw her walking towards Ⅲ .15 ECDBF Ⅳ .15 CBCAC Ⅴ . 15 CACBA 610 CABCA 第二課時(shí) Ⅰ . 1. tidy up 2. above all 3. play with 4. look out of 5. No one 6. put up 7. go to sleep 8. look up 9. fall asleep 10. reach out Ⅱ . 1. best 2. are 3. truth 4. done 5. kind 6. ever 7. should 8. yourself/yourselves 9. carefully 10. for Unit 3 Ⅰ .15 CCAAB Ⅱ . 1. can’t 2. may 3. Would 4. needn’t 5. have to 6. could 7. mustn’t 8. was able to 9. needn’t 10. must Ⅲ . 1. Be careful of 2. can be 3. clean up 4. pass on 5. look after 6. at least 7. stay out 8. in order to 9. No Smoking 10. hundreds of Ⅳ .15 ECDBF Ⅴ . 15 CCBAA 610 CACBC Ⅵ . Ⅶ . Dear David, Glad to receive your . Our school has made many safety rules for us to follow. Let me tell you something about them. We are asked to be careful with electricity when we are using it. It is dangerous to play with fire, for it may cause terrible accidents. We should make sure doors and windows are shut before we leave. Besides, we are not allowed to swim alone, especially in deep rivers or lakes. If we really want to, we must go to the swimming poor with our parents or teachers. What39。s more, following traffic rules is also very important. Everyone should watch out when crossing the road. And our school warns us not to play on the road. I think these rules are necessary as safety es first. Have a good summer holiday! Yours, Wang Wei