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) Big plums are usually sweeter than small ... . a) one b) ones 5) My son needs new shoes. His old ... are too small, they don't fit any more. a) one b) ones 6) I lost my dictionary last week and had to buy a new ... . a) one b) ones 7) Which cookies would you like? – The chocolate ..., please. a) one b) ones 8) Which is your suitcase, Madam? - That ... over there. a) one b) ones

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