The father writes ________ his son every month.

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I'm going to my aunt's home ________ her birthday.

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What they are talking about at the meeting ________ important.

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The doctor's job is ________ the sick people.

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He was riding to school ________ he was hit by a car this morning.

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We often hear him ________ the pop songs in the next room.

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Farmers often use tractors ________ them on the farm.

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________ we want to know is ________ car is stolen.

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The list of dates is so important that he ________ it very quickly.

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－Did you ________ what the teacher said?

－Not really. He spoke a little too fast.

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