this year, thousands of migrant _______ workerscancelled their insurance due to the lack of _______ policy to transferinsurance between difference regions

You can not imagine the difficulty they had ____ the problem It isn’t ____ easy

Are you going to Beijing by plane—It’s fast, but expensive, so I am not sure. I _______ take a train there.

Why don’t you ______ your ideas on paper? Then you won’t forget them.— Sounds a good idea.

Why not look up the new word in a dictionary _____ you don’t know it