Our school sports meeting we had looked forward to______ in _______ fine weather, which was beyond our expectation.

Children nowadays are bought up on a _______ of television cartoons and soup operas. 

Companies are struggling to find the right _____between supply and demand, but it is no easy work . 

Our lab is on the third _____ of a six—______ building.

The lack of eco-friendly habits among the public is thought to be a major _____of global climate change.