The trousers are too big for me. Please show me a smaller .A. oneB. pairC. pieceD. set（套）

问题补充：

The trousers are too big for me. Please show me a smaller .

A. one

B. pair

C. piece

D. set（套）

答案：

A. one

(答案→)B. pair

C. piece

D. set（套）

解析：trousers为复数，要用一双、一条