Most people take clean water for granted, but we ________ any if we don’t stop polluting the rivers and lakes.[ ]

Why didn’t you go camping with us?– But I ______ all about it!

A governmentofficial was murdered last Friday and the police are collecting informationthat is________to the case.

The shop assistants there were not friendly to me because of ____ .

eper of the spring cleared away the leaves and branches, and wiped away the silt that would _______ have choked and polluted the fresh flow of water.