When I was young,I liked to play jokes on people I knew,especially on my parents and friedns.One day my mother was   46   and I was playing with my younger brother Tony.
Suddenly I ran to my mother and said,“Tony fell from the open window!”She was very   47   and ran out of the kitchen.Then I said,“Don’t worry,I’m just   48  .”And my mother shouted at me,“If you do it   49  ,I’ll hit you.”
One day I went swimming with my   50  in the sea.I wanted to play a joke on them.In the beginning,I went swimming   51  ,and I called out,“Help!”All my friends came to help me,only to   52   that I was joking.But the next time I wasn’t joking.I was so   53   that I swam in deep water. I tried my best to call my frineds for help,but this time nobody came to help me.
  54  ,They found I was telling the truth.They came and saved my life.They took me to the hospital.This is the best   55  in my life.From then on,I haven’t joked on anyone.

A．writing B．sleeping C．cooking D．running

A．angry B．worried C．sorry D．excited

A．smiling B．saying C．playing D．joking

A．now B．then C．again D．once

A．friends B．classmates C．brothers D．parents

A．fast B．slowly C．well D．alone

A．find B．understand C．say D．think

A．careful B．careless C．fast D．slow

A．In the end B．At first C．Since then D．At that time

A．time B．sport C．lesson D．day