Don’tspend time beating ona wall,     to change it into a door.

We consider it necessary that a plan _______ before doing the work.

The water supply has been cut off temporarily because the workers ____ one of the main pipes.

–What is the theme about for the meeting this evening?. --No idea. Perhaps we will have to discuss the plan ___ a few days later.

—I’m sorry, but the boss isn’t here yet. Shall I have him call you when he comes back?—No, I’ll call him back. If I call again in half an hour, do you think she ________ ?