1.make,safe
2.sure,clear,across
3.should be,obey
4.should change
When my mother and I were going out for a walk,we met a foreigner on the road.He asked the way to the Hot Spring Hotel.I told him to walk along the road and turn left at the third crossing.And then he could see the hotel.He thanked me for my help and I was happy that I could help him.