Where ______(is or are )the pair of trousers

Where ______(is or are )the pair of trousers this pair of block trousers 填is还是are The pair of trousers is made【 from/of】 cottom 英语翻译this pair of trousers [ ].they are the right size. This pair of blue trousers is Tom's.The black trousers is To 改错 This pair of trousers are mine This pair of trousers are yours 改错 there are a pair of trousers.请问用is还是are? the boy often_____a pair of white trousers ______ pair of trousere is cool.I love _________ trousers.(t ( )The pair of trousers fits me well ____ the waist of it is This pair of trousers ( ) long.A.is B.are C.look