What time it is?It is about 8 o'clock 为什么用about而不用in?

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• What time it is?It is about 8 o'clock 为什么用about而不用in?
• what time --your father --(get) up?用所给词的适当形式填空He ---(get) up at five o'clock2.Bill ---(be) the first --(person) to come here4.My father---(get) home at 7:00 and ---(watch) the early morning news on TV5.---your brother---(go) to bed at eight o'clockYes,he ---6.--- you ---(eat）dinner at 4:00 in the afternoonNo,I ---7.I want ---(know) about ---(your) name8.His friend Bruse usually ---(do) homework at eight o'clock in the evening.
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• What time it is?It is about 8 o'clock 为什么用about而不用in?
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