There was a(n)________silence in the live interview，when no one knew what to say to the audience.

—Mary is a(n)        painter .—So she is . She won a national award at the age of fifteen .

 Allen had to call a taxi because the box was ____ to carry all the way home. 

As a manager, I know my emotions will affect people around me, so I’m going to make a  ____ effort to be more cheerful.

-- Are you happy with this laboratory? -- Not a little. We can’t have ________.