______ you hold your breath for more than a minute? - Of course not.

We ______ be able to go to the party. We are going to a wedding.

The book is optional. My professor said we ______ read it if we needed extra information for the essay. But we ______ read it if we don’t want to.

I was reading the book last night before I went to bed. I never took it out of this room. It ______ around here somewhere. Where ______ it be?

The machine ______ be turned on by pressing this button.

Listen, please. You ______ talk during this exam.

It ______ Sam who called and did not leave a message on the answering machine. I am not sure.

Your diving equipment ______ regularly if you want to keep it in good condition.

John ______ drive when he was eighteen.

     A. cannot                   B. could not            C. would rather not D. might not

Let’s go out for a drink. - I ______ love to.

Dane ______ the book we borrowed from the library. It was on the table, but now it has gone.

You ______ the air pressure in your tires if you do not want to get a flat tire on your trip.

You ______ book the tickets for the play in advance because they sell out quickly.

Please make sure to water my plants while I am gone. If they don’t get enough water, they ______ die.

Margaret promised to meet us at the entrance to the theater tomorrow night. She ______ for us when we get there.

With luck, tomorrow ______ be a sunny day.