30．Authorities face a 　　　　　task to persuade typhoon survivors to abandon their flood-stricken villages and relocate to lower and safer lands.

A. complex　　　　　　　　 B. tough　　　　　　　　　　　 C. easy　　　　　　　　　　　 D. sharp

29. To the great 　　　　　of the citizens, no one else was infected with H1N1 except the 12 confirmed cases .

A. relaxation　　　　　　　 B. disappointment　　　　 C. relief　　　　　　　 D. surprise

28. It was shameful to be found sleeping in class. His classmates’ laughter only_____ his embarrassment.

A. added to　　　　 B. appealed to　　 C .referred to　　　　 D. applied to

27．I witnessed the whole terrible accident, so I was taken to the police station and described it　　　　　 .

　　　 A．at length　　　　　　 B．at stake　　　　　　 C．on purpose　　　　 D．on end

26．I have battled with my 　　　　whether I should keep the extra money given to me or return it to the seller.

　　　 A．consciousness　　 B．perseverance　　 C．motivation　　　　 D．conscience