It's a 1 Sunday morning．Some good friends are going 2 a field trip to the Yellow Mountain．They are going to 3 a picnic on the top of the mountain．Every-one takes some food and drink 4 them． 5 two hours later, they are all tired and thirsty．They have to stop 6 a rest and drink．Then they go on 7 ．They have a lot of problems 8 to the top．Linda often goes the 9 way, Hill trips over a stone(石头), Sam has to tie his shoes, Ed can't 10 his heavy bag, Lucy hikes too slowly．But they help each other, and at last they get to the top．They have a nice lunch and a good time．