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

One of the consequences of our planet's being warming up is a（n）_______ in the number of natural disasters. 

Eric was well prepared for the computer test so that he could be positive about passing it on his first________.

Students in this school don’t have classes on Wednesday afternoon, which is      , for teachers have a meeting.

Most of the wood ___ to make furniture.