1 Unit 4随堂练习（一）第一题答案
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2 Unit 4随堂练习（一）第二题答案
1、loudly quietly
2、Thursday surf
3、hard park
4、summer winter
5、town brown
3 Unit 4随堂练习（一）第三题答案
1、write an email/ write emails
2、ten years ago
3、listen to the radio
4、read newspapers
5、do shopping on the Internet
6、all over the world
7、from Monday to Friday
8、surf the Internet
9、那时和现在
10、喜欢交朋友