It was not easy for him to buy good shoes because he had such a big of feet.A. coupleB.

问题补充：

It was not easy for him to buy good shoes because he had such a big of feet.

A. couple

B. size

C. number

D. pair

答案：

A. couple

(答案→)B. size

C. number

D. pair

解析：词义辨析。couple 一对，数个； size大小，尺寸； number数目； pair双，副。句意：对他来说买上一双好鞋不容易，因为他有一双如此大尺寸的脚。故选B。