You can ask him again if you like , but it won’t make any      —he’ll still say no .

Most members of the committee were in favour of the suggestion; only a ________ were against it.

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

Thanks to the modern electrical_____, housework nowadays has been made easier and easier.

It is widely accepted that animals learn to do things because their certain acts lead to _______.