The best method to________this goal is to unite as many sympathetic people as possible with the labor movement itself.[ ]

It is pretty well understood_______ controls the flow of carbon dioxide in and out the atmosphere today.

It is immediately clear ____ the financial crisis will soon be over.

I don’t regret ______ him what I thought even if it might have upset him.

Some lawyers have long called for changes to theselaws which they think are ___ in the 21 st Century.