I can't ________ my ruler. Where is it?

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Who do you think is the greatest scientist ________?

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The Olympic (奥林匹克的) ________held every four years.

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Many people in less ________ countries are living a poor life.

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This shirt is so nice, but it ________ too much.

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When new types of computers appear on the market, the prices of old computers may ________.

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I don't know what to do next .

I don't, ________ .

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The girl fell off her bike and was ________ hurt.

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Don't worry ________ my health. I'll be fine soon.

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The old woman was ________ after a good operation.

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