----Are you going to buy a camera? -----Yes. But there are so many kinds that I can’t decide __________ to buy.
___________,is this your eraser?
—Are these their cars? —Yes,__________.
--- is the soccer ball? --- It’s green.
当别人夸你的衣服漂亮时,你应说:___________.
-Dad, this is my friend, Dick. - ________.