The teacher is busy ____ teaching.
Remember that customers don’t__about prices in that city.
John Dewey believed that education should be a preparation for life,that a person learns by doing,and that teaching must__the curiosity and creativity of children.
The government is trying to go something to_better understanding between the two countries.
However,at times this balance in nature is__,resulting in anumber of possibly unforeseen effects.
The president made a__speech at the opening ceremony of the sports meeting,which encouraged the sportsmen greatly.