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课件网) Unit 4 Then and now Part C [视频][视频] Let’s watch a video. Let’s check Listen and number. 3 1 2 Cross out the words you didn’t hear. Let’s check gym dining hall grass cycling ice-skating badminton Changes are all around us. Talk about the changes below. It was an egg. Now ... It was raining. Now ... In summer, the tree was green. Now ... There was a building before. Now ... The cat was on the chair. Now... Chen Jie was short. Now she is 1.5 metres tall. Story time Cavemen often ate raw meat. They didn’t cook their food. Story time Now there are many things to help you cook. Story time In 2050, there will be house robots. They will cook, clean and wash the dishes Story time Oh, cavemen didn’t cook their meat It’s OK. They didn’t do the dishes either! Story time There were many trees, and there were many clean rivers. Story time Now, there are more and more buildings. Story time We should help the earth now, so birds will have homes and the forests will be healthy and green again. Story time Look! How beautiful the world was! Oh! What will the birds do Don’t worry. People will help them. Story time Before humans lived on the earth, whales already lived in the sea. Story time Now, there are not many whales. Story time If we change now, whales and humans will have a bright future. Story time Heal the world! Make it a better place! There _____ lots of trees on the farm many years ago. A. is B. are C. were 单选题。 Practice C 解析：句意:很多年以前农场里有很多树，本题考查there be句型，根据ago可知句子是一般过去时，空后名词trees是复数名词，所以be用were，故选C。 单选题。 Practice Before Ben didn’t like sports. But now he _____ exercise every day. A. do B. does C. did B 解析：句意:以前Ben不喜欢运动。但是现在他每天去锻炼。本题考查动词的形式。A是动词原形，B是动词的第三人称单数，C是动词的过去式。根据every day可知时态是一般现在时态，动词用第三人称单数，故选B。 单选题。 Practice At that time, people _____ go _____ bus. ( ) A. don’t; by B. didn’t; by C. didn’t; on B 解析：句意:那时，人们不乘公共汽车去。本题考查助动词和介词固定搭配。根据时间可知句子是一般过去式，助动词用didn't，by bus乘公共汽车，故选B。 Thanks!
