What do you know about the universe?
Why do we say the world itself is becoming smaller and smaller?
2．或者教师根据每个自然段内容，设置如下概括性问题：
1) What do we mean when we talk about the universe?
2) Do you know anything about the moon? Try to say something about it.
3) What is a man-made satellite? What's it used for?
4) Please say something about people's knowledge of the universe.
教师可将学生们的回答简单地板书在黑板的一侧。然后让他们打开书阅读课文。
学生们阅读后，教师带着他们验证猜测。在这个过程中，实际上教师是在让学生熟悉本课的大意，并接触课文中的句型和词语。教师在黑板的另一侧板书课文中的关键词，与学生们的猜测答案相对照。下一步让学生逐段复述课文。反复数次后，让学生做根据课文某段所改编的完形填空题。如：
The universe means the earth, the sun, the moon and the stars, and the space ______ them. Many of the stars are so ______ away that we ______ see them.
The moon, our ______, travelled ______ the earth. It has been visited _____ man in spaceships.
Man-made ______ have been sent up ______ space by many countries. They go ______ the earth. They are used for helping us to learn more ______ the earth, the weather and other things. They are also used for sending and ______ messages. It makes people ______ different countries understand each other better. So people say the world itself is becoming a much ______ place. People call the small place “the global village”.
Answers:
bet
《上学期 Unit 12 Mainly revision(第3页)》出自：www.89xue.com网www.89xue.com ween, far, can not, satellite, round, by, satellites, into, round, about, receiving, from, smaller
学生在做这个练习答案的过程中，即复习了本课的词语，又掌握了与课文内容相关的新表达方式。这样他们完成其他练习也就不难了。教师可继续让他们将这个练习中的语句与课文作比较，找出异同，例如：
1) 课文—Many of the stars cannot be seen because they are too far away.
练习—Many of the stars are so far away that we cannot see them.
2) 课文—The moon travels round the earth. It is our satellite.
练习—The moon, our satellite, travels round the earth.
在这种比较过程中，学生又一次熟悉了课文内容及词语，特别是被动语态的用法。与此同时也锻炼了他们的思维能力，认识到英语语言表达灵活的特点，为下一步第48课的词汇教学做好辅垫。
关于数字表达方法的教学建议
在教授第47课时，为了给学生创造更多的机会，教师可提供火车列车时刻表中全国各主要城市间的距离表或世界各地航空路程表，将其放大制成挂图，贴在黑板上。可先根据 Practise的内容，让学生做快速的连锁问答，使他们熟悉句型和数字，并达到脱口而出的熟练程度。然后练习Ask and answer可的材料。其中的重要句型是：
1 ) How many kilometres by train is it from… to…?
2) How far away is…from…?
3) What about …?
教师要求学生用自己的词填入空缺的部分，这样可以造出许多句子，而且还可以复习或预习课文中出现的词语。例如：
1 ) How many li by air is it from … to…?
2) How far away is the earth from the moon?
3) What about other planet?
练习表示数量的方式有许多种，例如教师将一摞书带到课堂上，让学生猜每本书的页数。
做这样的对话：
T: How many pages do you think this book has?
SI: I think about 120.
T: No. The number is too small.
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