—How do people do bird-watching? —Sometimes they______the birds quietly, sometimes they use telescopes.
Along the either side of the street _______ two lines of trees.
______ interested us most was ______ he saw last night.
We make ________ that whoever leaves last turns off the light.
Mr. Green was chosen ________ of the club.
The singer, together with some of her fans, _____a song on the stage.