下列各句中，没有语病的一句是( )

__________ is it from Sunshine Town to the center of Beijing— It’s about 20 kilometers ________ our school.

Nearly three days after an 8.8-magnitude earthquake, rescuers in Chile were making every effort to _____ possible survivors.[ ]

It was not until near the end of the letter she mentioned her own plan.

Your teacher will ______ you if you are against the school rules again.