动词填空 。可适当填加助动词或情态动词。

     Last Sunday, my friends Wang Tao, Zhang Jun asked me to go __1__ (swim) with them. Soon we got

  to the river. They were swimming in it. But I couldn't swim. So I__2__ (sit) under a big tree and watching

  a little boy __3__ (play) with a ball near the river. But the ball __4__ (fall) into the water and he fell into

  the water, too.

    I was standing up and __5__ (call) for help. But my friends __6__ (be) far from me and they__7__ (not

  hear). So I jumped into the water. I didn't know how to swim in it, but I __8__ (take) the little boy out of

 the water. His parents thanked me very much. They said, "You are a good boy, a good young pioneer."

     When my friends knew this, they all smiled and __9__ (say), "You __10__ (swim) now."