今天我们考了你们的ｒｅａｄｉｎｇ，你们都还不错。　你们的作业是：ｅｉｔｈｅｒ　ｗｒｉｔｅ　ｏｒ　ｔｙｐｅ　ｏｕｔ　ａｎｗｓｅｒｓ　ｆｏｒ　４－６　and 4-7.   For 4-6, you need to write up two comparative sentences based on each scenarios given; for 4-7, please write up the question, and then provide the answer as a Q and A.

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