The United Nations ____ in 1945.
.. Shanghai is trying to control ________ number of cars on the road to ensure clean air for ________ 2010 World Expo.
.The report shows that global climate change__________the drought in Southwest of China but ______ we need to make greater efforts.
.This old computer must have been of great use to ____________ did the scientific research.
..It was _______ he said that _______ me feeling frustrated.
.__________I am amazed at is__________she wants to find fault with others all the time.