阅读下面的短文，根据短文内容，从方框内所给11个动词中选择10个意义相符的词，必要时进行词形变化（可添加助动词或者情态动词），填入空白处．

see， cross， drink， travel， ask， remember， clean， wait， take， rest， think

Once upon a time， a father and his son were walking from one town to another． While they （1）　　，they happened to pass by a river． They were tired and stopped there （2）　　． Then the father asked his son to get him some water from the river．

    Then the son walked to the riverside and he （3）　　some women washing clothes there． Right at that moment， a bullock cart （牛车） started crossing the river． As a result， the water became very dirty． "I mustn't take the dirty water to my father， " he thought． So he came back and said， "Look， Father． A bullock cart （4）　　the river now， so the water is dirty and it can't be drunk．" Father said nothing．

    After a while， the son （5）　　to get some water again by his father． The water was still dirty， but he didn't go back． He thought， "My father is so thirsty． I （6）　　back clean water this time， even though it will take me a long time．" Then he sat there， waiting until the water was clean． He collected some in a bowl and took it back．

    "Oh， you are back at last． I （7）　　for you for almost half an hour，" Father said． After （8）　　the water． he looked up at his son and said， " Now， （9）　　about what made the water clean． You let it be and the water became clean on its own． It is also the same with your mind． When it is disturbed （打扰）， just let it be， and it will calm down on its own． "

    The son thought for a while and said， "Thank you， Father， I （10）　　this forever．"

    We can make best decisions when we stay calm．