31．It is hard to imagine what I ___　　　 　today if I hadn't been admitted to Nankai Middle School 15 years ago.

　　　 A．would have done　　 　　　　　　　　　　　　 B．will do　　　　　　

　　　 C．am doing　　　　　 　　　　　　　　　　　　　 D．would be doing

30．Not until they left school ___　　 　how much their teachers loved them and helped them．

　　　 A．they realized　　　　　　　　 　　　　 B．did they realize

　　　 C．they had realized　　　　 　　　　　　　　　 D．had they realized

29．___　　　 three times in a row, the boxer decided to make a fourth attempt, though．

　　　 A．Having defeated　　　 　　　　　　　　　　　 B．To have defeated

　　　 C．Having been defeated　　 　　　　　　　　　 D．To defeat

28．___　　　 　is well known is that Africa had contacts with India and the Red Sea civilizations from the earliest times．

　　　 A．As　　 　　　　　　 B．It　　 　　　　　　　　 C．What　　 　　　　　 D．That

27．The truly homeless are the rich who __　　 _ their home into a hotel hall．

　　　 A．will turn　　　　　　 　　　　　　　　　　　 B．turned　　　　　　　

　　　 C．are turning　　　　　 　　　　　　　　　　　　 D．have turned

26．-George, ___　　 _ you sing so loudly at such a late hour?

　　　 -I am terribly sorry．

　　　 A．will　　　 　　　　 B．may　　　 　　　　 C．must　 　　　　　　　　 D．shall

25．All the drivers have been warned that driving after drinking shall __　　 __ serious accidents．

　　　 A．bring up　 　　　　 B．bring back　 　　　 C．bring in　 　　　　　 D．bring about

24．Depression is the leading cause of suicide, __　　 __ in turn is the third leading cause of death among 15 to 24 year olds in the United States．

　　　 A．who　 　　　　　　　　 B．which　 　　　　　　 C．that　　　　 　　 D．what

23．Everyone agrees that the Philippine police ____　 　for the tragedy that Hong Kong tourists were killed．

　　　 A．are to blame　　　　　　　 　　　　　　　 B．are to be blamed

　　　 C．are being blamed　　　　　 　　　　　　　　 D．have blamed

22．In ___ year 751, the Chinese traveler Du Huan was taken __　　 _ prisoner by the Arabic army．

　　　 A．a, the　 　　　　　　　 B．/, the　　 　　　　　　 C．the, a　 　　　　　　 D．the,/