1) There are many keys here. Which  ... are yours ? a) one b) ones 2) How old are your children? The younger ...  is six and the older is nine. a) one b) ones 3) New computers are much smaller than the old ... . a) one b) ones 4) I don't care how fast my car goes. I just want ... that is dependable. a) one b) ones 5) My bag is so old. I need a new ... . a) one b) ones 6) Big plums are usually sweeter than small ... . a) one b) ones 7)  Which is your wife? The blonde ... or the brunette? a) one b) ones 8) My son needs new shoes. His old ... are too small, they don't fit any more. a) one b) ones 9) When you buy two shirts, you get a third ... free. a) one b) ones 10) I lost my dictionary last week and had to buy a new ... . a) one b) ones

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