It takes about two hours to get to their office building, _________ possible traffic delays.

It was announced that only when the terrible disease was under control ________ to return to their homes.

We travelled together as far as Chicago, _______ we parted.

_____ the environment is important for human beings.

I’m very sorry, but the manager isn’t here yet.—Oh, if I call again in an hour, do you think she _______ ?[ ]