短文改错Li peng was enjoying a springtime family picnic in a mou

Li Peng was enjoying a springtime family picnic in a mountain while（1、改为when） it happened.His dog,Wang Cai,unexpected（2、改为unexpectedly） fell into melted snow,and it was washing（3、改为washed） away.Li Peng knew he had to be calm and act faster（4、改为fast）.All of the（5、改为a） sudden,he ran towards the edge of the river.When he got to（6、去掉to） there,he put his feet around a small tree,but（7、改为and） hang his body over the water to try and reach the dog.She（8、改为He） could see that the dog was struggling in the water.Finally he is（9、改为was） able （10、加上to） grab the dog and pull it out of the river.

修改如下:
Li peng was enjoying a springtime family picnic in a mountain while this happened. His dog ,Wang Cai, accidently fell into the snow-melted river and was being washing away . Li Peng knew he ...