So far we have done a lot to build a low—carbon economy, but it is ____ideal. We have to work still harder.
One of the witnesses to the accident wrote a report to the police, he described what had happened.
too much for supper that evening, the boy could not go to sleep until deep into the night.
— It’ll take at least two hours to do this!— Oh, _______! I could do it in 20 minutes.
I don’t think you _______ give up the opportunity to go to university which you have been dreaming about.
Luggage may not be brought into the building ________ a guard has checked it first.