Since the baby milk powder was found to be polluted, there has been universal doubt _____ other food products are safe _____.

Whether to find a job or continue to study seems to be a(n)_____ topic of conversations among graduates. [ ]

－Can I justhave a try?－Sure. Itdoesn’tif you give a wronganswer.

The study was carried out in one small town so we can’t be sure that the results are truly ________.

The man _____ his coat when hewalked into the warm room.