24．Raising environmental awareness was the aim of our art exhibition ____ last week.

　 　 A．to hold　 　　　　　　　 B．held　 　　　　　　　　　　　 C．having held　 　　　 D．being held

23．_________ he was, he still went on with his work.

　 　 A．Tired although　 　　　　　　　　　　　　　　　　　　　　　 B．Tiring as　　　 　

　　　　 C．Tired though　　　 　　　　　　　　　　　　　　　　　　　 D．While tired　

22．It was the training ________ he had as a young man ________ made him so excellent.

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

21．Not until she took off her dark glasses ________ she was a famous film star.

　 　 A．I realised　　　 　 B．that did I realise 　 C．did I realise　　 D．that I realised　

20．It is ten years since we ________ each other last time．　

　 　 A．see　　　　　 　 B．have seen　　　 　 C．saw　　　　　 D．had seen　

19．More wild tigers have been seen in the forest around this area, ________ there used to be very few.

　 　 A．when　　　　 　 B．where　　　　 　 C．what 　　　　　　　　　 D．which　

18．It is usually warm in my hometown in March, but it ________ be rather cold sometimes.

　 　 A．must　　　　 　　 B．can　　　　　 　　 C．should　 　　　　　　　 D．would　

17．You can never be ________ when crossing the street．

　 　 A．very careful　　 B．too careful　　　 　　　　　　　　　　　　　　　　　　　　　

　　　　 C．carefully enough　 　　　　　　　　　　　　　　　　　　　　 D．enough careful

16．________, you need to give all you have and try your best．　

　 　 A．Being a winner 　　　　　　　　　　　　　　　　　　　　　　　 B．To be a winner 　　

　　　　 C．Be a winner　 　　　　　　　　　　　　　　　　　　　　　　　　　 D．Having been a winner

15．Before Sally left home, her mother kept telling her to ________ her manners at the party.

　 　 A．notice　　　　 　 B．care　　　　 　　　　 C．mind　　　 　　　　 D．observe