No reader ________ take away a book from the library without the permission of the librarian.

．—What’s the matter with the man hanging his head there?
—Well, if you _______ know, he was caught stealing my bike.

I’m so surprised that such a clever man as he_________be easily taken in.

There was plenty of time. She ________ .

-----________ he be watching TV now?
------Yes, he ________ be watching TV now.

-----He should have come to join in the thorough cleaning.
-----He________, I think. It’s not his turn.

. There ____ be a flight for Kunming this evening, but you’d better find it out for sure.

If you ______ earlier, you ________ him.

It is high time we ______ awareness of environmental protection.

. Research findings show we spend about two hours dreaming every night, no matter what we ____ have done during the day.