12. Mr. White works with an import and export company, but he ______ for this industrial fair, since he is on leave.
35.Low-carbon lifestyle is of great benefit to improve the world environment._______can be enjoyed from it until you have a deep under, standing of it,however.
34.The scientist was rewarded by the government for_____such a great,contribution to the country.
33.Too high house prices can be brought under control,________the authorities introduce a series of regulatory policies.
32.________all kinds of difficulties,the workers have made rapid progress in the construction of the World Expo 2010 Shanghai.
31.—Bob! How’s your project? I heard you started it last Friday,right? —Oh!I _________for it.But I haven’t decided when to do it.