What did Emily have to do? She had to practice the piano.
難易度：高（13語）
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Students have to wear uniforms in this school.
Tom and his brother have to clean their rooms.
Do we have to read these books? Yes, you do.
Why does he have to study so hard?
Do I have to speak English? No, you don't.
She didn't have to go there alone.
He has to wash three cars.
She didn't have to wash the dishes.
Does she have to stay calm in the room? Yes, she does.
How many books were you able to read last week?
May I eat this bread? Yes, you may.
We were able to swim in the lake all day yesterday.