He made another wonderful discovery, __________ of great importance to science.

If I _______ next week, I _______ the film with you. Actually, I can’t wait for that.

The poor boy is in danger. We should do all we _____ help him out.

You had better finish _______ your homework.

Simon, when are we going to have a class meeting this week?— Sorry. Ask our monitor, please. He know.