The days are gone ________ we could leave our door unlocked at night.
What a pity ______is ________ you didn’t arrive by daylight.
As the day was fine ,I made the suggestion _______ for a walk in the park .
It is uncertain ______ the experiment is worth doing .
I’d like to work with ____ is honest and easy to get on with.
Mary wrote an article on __the team had failed to win the game.