1. —When do you often eat dinner?
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2. —When do you often go to bed?
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3. —When does Tom often watch TV?
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I/We often eat dinner at seven o'clock.
2. —When do you often go to bed?
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I/We often go to bed at nine o'clock.
3. —When does Tom often watch TV?
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He often watches TV at eight o'clock.
答案：1. I/We often eat dinner at seven o'clock.
2. I/We often go to bed at nine o'clock.
3. He often watches TV at eight o'clock.
2. I/We often go to bed at nine o'clock.
3. He often watches TV at eight o'clock.