The work was difficult, but Tom’s ____expression showed that he would finish it in time.

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

 ---Do you know what Tom does all day? ---I know he spends at least _______ time watching TV as he does spend doing his lessons.

The little boy still needs the________20 dollars to do with some things________.

My new neighbor is a _____ person; he never speaks to anyone and nobody knows where he is from and what he is doing.