Our maths teacher set so difficult a problem ________ none of us worked it out.

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There are so many TV sets in the shops that I really don’t know ________.

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A．what to buy

B．which one to buy

C．to buy which one

D．which one should buy

I don’t understand what you’re talking about, would you ________ a little?

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--Are you sure to help me find ________ bed for my new house?

--Of course, but not now. I'm heading for ________ bed and want to have a good sleep.

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I asked my boss for a month's holiday and, ________, she agreed.

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I hardly ________ go out in bad weather.

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When young I was ________ shy to ask people for directions that I never dared to ask complete strangers the way.

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Was it in the street ________ you met him last week?

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It is ________ that our team has won the game.

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It was on October 1st ________ new China was founded.

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