Though ________ in a big city, Bill always prefers to sing the songs of country life.
--- Why did Sarah cry just now? --- She wanted a toy, _____ I can’t afford.
You’d better keep ______ when I take photos for you.
I can’t afford _______ car.
Along the either side of the street _______ two lines of trees.
______ interested us most was ______ he saw last night.