Mr Smith, looking ______, started to work out a        problem.

—Are you pleased with what he has done?—Not at all. It couldn’t be _______. Why didn’t he put more effort into his work?

We have every reason to believe the print media are usually more      and reliable than Internet.

Bob has a billion dollars while Kate has a million, so Kate is ________than Bob.

It may have been unusually cold recently but experts say it's ________ for this time of year.