20. Of the making of good books there is no end; neither_____ any end to their influence

on man’s lives.

　 A. there is　 　　　B. there are　　 　　　　C. is there　 　　D. are there

19. ______ Sunday, rather than ______ TV all day, I preferred ______.

　 A. Being; watch; traveling　　　　　　　　　　　　　　 B. It being; watch; to travel

　 C. It was; to watch; travel 　　　　　　　　　　　　　　　　　 D. It were; watching; traveling

18. Legend has ______ that CaoCao, King of Wei kingdom in the Three Kingdoms period, built 72 tombs to confuse tomb diggers.

　 A. it 　　　　　　　　　　　 B. this 　　　　　　　　　　　　 C. them 　　　　　　　 D. itself

17. It is high time we ______ awareness of environmental protection.

　 A. promoted　　　　 B. would promote　　　 C. shall promote　 D. had promoted

16. How can they learn anything useful ______ they spend all their spare time playing online games?

　 A. while　　　　　 B. unless　　　　　　 　C. although　　　 D. when