Mr.  and  Mrs.  Green  were  very  worried  about  their son, Leo. He seemed to be dumb( 哑的）        he  was  normal in every other way. Mr. and Mrs. Green  tried  everything to get him to       ,but with no success.When Leo was six years old, the best  doctors in the town        him carefully, but could find nothing wrong.
And he seemed to be smart. It was just that he _      spoke.
“There might be something wrong with his          ，and he doesn’t know he's able to speak，’，one doctor said.“But he can read and write，，，said  Mr. Green. “We’ve written him notes, telling him that he can speak. ”“It’s certainly very         ，” another doctor said.  Perhaps he’ll be able to speak some day. ”      passed. Leo went to university. But he did not say a        word. Then one day,Leo was having a meal with his parents. Without any warning, he looked up  from  his         and said，“Pass me the salt,please. ”
Mr. and Mrs. Green were excited. “You  spoke! You spoke!” they cried. “ Why have you         so long to speak?” “I didn’t have anything to  say，，，he said. “Until now everything was perfect. But you forgot to put salt in potatoes. ”

A．because B．when C．though D．before

A．speak B．walk C．play D．laugh

A．taught B．found C．examined D．asked

A．never B．often C．usually D．always

A．back B．hair C．face D．mind

A．unfair B．strange C．noisy D．quiet

A．Hours B．Weeks C．Months D．Years

A．good B．right C．single D．new

A．chair B．meal C．hands D．books

A．slept B．walked C．served D．waited