He________sleep，although he tried to，when he got on such a hunt for an idea until he had caught it.                                                     (2013·湖南，32)

No one________ be more generous；he has a heart of gold.         (2013·天津，9)

------ Where is my dictionary ? I remember I put it here yesterday .
-------- You ______ it in the wrong place .

—Why，I didn’t get you on the phone.
—We ________football on the playground when you phoned.

—I wonder where Peter is.He said he’d be here for lunch.
—Don’t worry！He________be caught in the rush hour.

My mother is a great cook and we ________ never get enough of her cookies.

—Could I have a word with you，mum?
—Oh，dear，if you ________.

It is important to know about the cultural differences that ________ cause problems.

I’m as busy as a bee；________ you bother me with so many questions now?

—I called you at 9 last night，but no one answered.
—Sorry，I ________ sleeping.I went to bed very early.