You (A) have to (B) made sure that children (C) don't play outside alone

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1.
You (A) have to (B) made sure that children (C) don't play outside alone.
A
2.
You (A) mustn't (B) uses the motorbike without a driver's license. It's (C) against the law.
А
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C
3.
Drivers (A) haven't (B) to stop at (C) yellow traffic lights.
A
C
4.
You (A) ought (B) to taking him (C) to the emergency room.
A
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