Choose the best answer to fill in the blank.

We cannot find the person _____ car is blocking our driveway.

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Mary prefers to read books ______ are written in English.

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The reason _______ I phoned him was to invite him to my party.

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Can you suggest a time at ____ it will be convenient to meet?

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A climber ______ heart had stopped beating in a snowstorm on Mont Blanc was revived by French doctors yesterday.

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His parents did not know the reason _____ he chose to be an English teacher.

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The Ha Noi tower _____ I am working is one of the popular place for tourists when they come to Hanoi.

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All people to ____ the email was sent replied.