Had I known about this computer program, a huge amount of time and energy       .

With lots of papers to read, he ____________ to the cinema.

If you don’t like to swim，you _____ as well stay at home．

Nathalie suggested the problem worth paying attention ______ at the meeting.

——This wall of air is an effective answer to the problem and it ____ work.——But it is a question to put such a wall of air around the statue.