The government will force companies to ________ any possible measure to reduce air pollution.
We still remember once__________round the famous tower when we were young.
— Marx looks nervous. — So____________you if you had so fierce a competition.
________ good use you have made of your time to work, there is still some room for improvement.
It was the quality of life in the futureI took this training course,not just to make more money.
They didn’t attend the discussion, although they _________.