Early experiences taught me not to be overly _      about shopping by mobile phone because there is a high risk of being cheated．

Many people think that it is ______ making such an experiment.

They looked at each other, ______. 

— You looked so ______, what’s the matter?— I’ve had a very trying time this afternoon. I had to spend the whole listening to the _____ lecture by Mr. Smith.

Stop beating about the bush.I want a(n) __________ answer,“yes” or “no”.