If these jeans are too short,buy a bigger one还是 pair

If these jeans are too short,buy a bigger one还是 pair If these trousers are too short ,buy a bigger A one B pair C If these trouser are too short,buy a bigger( ) If these trousers are too big,buy a smaller__(one/pair)什么时候用 If these trousers are too short ,buy a longer ____. If these two shoes are too small,buy a bigger __________ A.o if these trousers are too big ,buy a smaller ___ A.one B.cop My jeans are too old .May I have a new______(one,pair)?选什么 If these trousers are too big,buy a smaller _________ . the trousers are too long .I need a short --.A pair B one选那个 this pair of jeans is too long,could you show me a short pai My jeans are to long .try（ ）on是选A.this pair还是B.this one还是C.t