—Hurry up! The bus is coming. —Wait a minute. Don’t cross the street _______ the traffic lights are green.
——Who watered the flowers beside the window?——Helen ____________.
Goldfish don’t know _______ to them three seconds ago.
Does this book belong to ______?
It ______ him an hour to play basket ball every day.
These aren’t ________ cards. They’re_______