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Many young people took part in planting trees on Tree Planting Day. 很多年輕人在植樹節(jié)那天參加了植樹活動。 課堂練習(xí) 一、用所給單詞的適當(dāng)形式填空 1. Do you often memorize new words by ___________ (make) vocabulary lists? 2. Can you finish _________ (do) your homework before nine o’clock? 3. As we know, it’s not polite to keep others _________ (wait) for a long time. 4. _________ (help) each other at school is a way to improve our friendship. 5. We have worked for three hours. Let’s stop _______ (work) and have a rest. making doing waiting Helping working 二、單項填空 ( )1. —________ does Ruth municate with her friend in K