Sometimes it was a bit boring to work there because there wasn't always ______ much to do. 

With the word“PM2．5"_____ appearing in media reports，people pay greater attention to it and seek health tips for smoggy days．

He may not like my visit, but I shall go and see him _____.

On snowy days, you have to drive very ________ to avoid traffic accident.

Do you dress differently because of what you see in advertisements or buy things you might not ________buy？