The little boy entered the house unhappily. His mother was  1  cakes in the kitchen. She smiled as she  2  ,but stopped when she saw his face.“Tyler,  3  happened? Is everything okay?”
“Nothing is okay,Mom,” said the boy.” Today, in our science lesson, Mrs Green talked about the 4 .The whole world is getting dirtier and many animals and plants are dying, She wants us to think of something we can do to help. I thought all the way home, but there is  5  I can do to make a difference.”
“Let me tell you a  6  ,”the mother said after thinking  for a while .“ One morning a man was walking down a beach, there he saw thousands of dying starfish（海星） covering the beach, they were pushed up by the   7  . and it was too far for them to make their way back by  8  . The man shook his head as he walked along,“What a pity!So many starfish will die on the beach.” The man felt very  9  for those starfish . He went on walking and just at that time he was  10  to find a boy in front who was throwing the starfish back into the sea as  11  as he could. “How silly you are! My  12  ,” the man said.“There are so many starfish, and can you throw all of them back?” The boy didn’t stop but kept throwing. “  13  I can’t help them all, I can make a difference to this one, and this one, and this one,”said the boy.“Thinking for a moment, the man  14  to help return the starfish to their home. He smiled and said to himself, “Sometimes the biggest lesson in life comes from the   15  person.”

A．drinking B．making C．selling D．washing

A．turned around B．turned down C．turned on D．turned off

A．what B．when C．where D．why

A．air B．land C．water D．environment

A．something B．anything C．everything D．nothing

A．lie B．joke C．story D．way

A．wind B．rain C．waves D．sands

A．himself B．itself C．ourselves D．themselves

A．tired B．sorry C．happy D．excited

A．afraid B．surprised C．sad D．angry

A．slow B．fast C．soon D．high

A．father B．mother C．son D．daughter

A．Or B．So C．Because D．Though

A．began B．continued C．forgot D．waited

A．shortest B．tallest C．smallest D．biggest