(2006·广东)

So difficult ________ it to work out the problem that I decided to ask Tom for advice.

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The King of Prussia ________ that his greatest gift would have such a strange history.

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A．hadn't had imagined

B．shouldn't have imagined

C．mustn't have imagined

D．couldn't have imagined

--- Why! I ________ get you on the phone.

--- We ________ basketball on the playground when you phoned.

[　　]

A．didn't; must be playing

B．couldn't; must be playing

C．couldn't; must have played

D．didn't; must have been playing

Everything ________ into consideration, they ought to have another chance.

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(2005·湖北)

The repairs cost a lot, but it's money well ________.

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(2007·重庆)

--- Do you have any idea what Paul does all day?

---As I know, he spends at least as much time playing as he________.

[　　]

--- How do you deal with the disagreement between the company and the customers?

--- The key ________ the problems is to meet the demand ________ by the customers.

[　　]

--What about the person?

--Seldom in all my life _________ such a _________ person.

[　　]

The pupil asked the teacher how much time he spent ________ violin every day.

[　　]

The teacher asked more ________ to prevent the students’ eyes from _______.

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