— John has put forward ______ most challenging question for us to answer.— Yes, it really is. I have never heard ______ harder one.
There were so many cars held up by the heavy rain on the road that we had no but to wait.
that we can’t get the necessary equipment , we will have to give up the experiment.
_____professional development, big cities appeal to many young people .
Only when the European countries' financial system broke down _____to take measures to deal with those problems.
He, an average citizen, always thinks of_____ he can do more for the people.