题目内容
4. There are many (优点) of riding a bike.
4. advantages
9. pull down
( ) 4. ―What happened Dave yesterday?
―A friend invited him boating.
A. to;go B. to;to go
C. on;going D. for;goes
2.上交
6. 对……有益
13. throw... into...
( ) 4. Riding a bike to school is good for ，and it doesn't cost
A. health;nothing B. healthy;anything
C health;anything D. healthy;something
1. 听说
4. No (科学的) studies have shown that shark fins are good for health.
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