They ________ the plan for almost three hours, but they haven’t reached any conclusion.
The scientists were waiting to see the problem _______.
The foreigner tried his best, but he still couldn't make his point _______ .
People _______ in the city do not know the pleasure of country life.
The _______ price will save you one dollar for each dozen.
The student corrected his paper carefully, _______ the professor's suggestions.