________ city would you like to live in, Beijing, Shanghai or Chongqing?
About seventy percent of our earth _______ by water.
Don’t worry about your boy. His temperature will ______ back to normal(正常)if he takes this medicine.
Don’t ______ until the bus stops. Or it’s too dangerous.
Mr. Smith was ill ______. He had to have three weeks ______.
Paul made a nice cage ______ the little sick bird till it could fly.