1．集邮　　　　　　　　　　　　 　　　　2.实际上　　　　　　　　　　　　　　

5.I have been in class　　　 5 hours ago.

Unit 6

Exercises 3

4．She has been collecting shells　　　 she was ten years old.

3.I have been skating 　　　　five hours.

2.I have been skating　　　　 nine o′clock.

1.I am talking 　　　　you 　　　　　the Hilltop School Skating Marathon. Here,students are skating to 　　　　money 　　　　charity. 　　　　every hour they skate,each student raises ten yuan for charity.The 　　　　marathon has been going 　　　five hours now, 　　　　several skaters are still skating.

以下几题请用since和for填空

3．　 他从九点开始滑冰到现在。

3．你第一双滑冰鞋什么时候买的？

2．　 你已经收集贝壳多长时间了？

1．　 我今天已经在教室呆了好几个小时了。