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填入 must / mustn’t / had to / don’t need to。
You go. You can stay here if you want.
It’s a fantastic film. You see it.
The restaurant won’t be busy tonight. We reserve a table.
I was very busy last week. I work every evening.
I want to know what happened. You tell me.
You tell Sue what happened. I don’t want her to know.
I hurry or I’ll be late.
‘Why were you so late?’ ‘I wait half an hour for a bus.’
We decide now. We can decide later.
It’s Lisa’s birthday next week. I forget to buy her a present.