We ________ have hurried all the way to the airport — the flight was called off because of the foggy weather.
I was disappointed with the film . I had expected ______ to be much better.
It was not _____ she took off her glasses _____ I realized she was a famous film star.
Does ______ matter if he can’t finish the job on time?
I don’t think ____ possible to master a foreign language without much memory work.
Is ____ necessary to complete the design before National Day?