There is much ______ can be done about theaccidents ______ from carelessness.

I don’t know _______he will come tomorrow. _______he comes, I’ll tell you.—That’s a deal!

The doctors insisted that the patient was in danger, and that he __________on immediately.

___ reading books in my spare time, I also surf on the internet sometimes

My mind wasn’t on what he was saying so I’m afraid I _______ half of it.