15. When I was a child, I learnt that the Yangtze River was the

　　　 first longest river in China.　　　　　　　　　　　　 　 　　　　　　

14. His father has died for forty years.　　　　　　　　　 　　　 　　　　　　　

13. He do say that he is fond of stamp collecting.　　　　　 　　 　　　　　　

12. I shall speak to him as soon as he will come.　　　　　 　　 　　　　　

11. He speaks Chinese very well, but I am not sure whether he can　　　

speaks Cantonese too.　　　　　　　　 　　　　　　　　　　　　

10. I am in this school for two years.　　　　　　　　　　 　　 　　　　　　　

9. They asked him to be captain, but he refuses.　　　　　 　　　　　　　

8. If he would have asked me, I should have stayed.　　　 　　　　 　　　　　　　

7. The train left before I arrived.　　　　　　　　　　 　　　　　　　

6. She talks as if she knows everything.