You must be worried that she is so late coming home.
I must go to bed earlier.
You must come and see us some time.
I have to arrive at work at 9 sharp. My boss is very strict.
We have to give him our answer today or lose out on the contract.
You have to pass your exams or the university will not accept you.
He should be there by now.
I should be at work before 9:00.
He should have left by now
People with high cholesterol should eat low-fat foods.

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