—Look at these stamps. Ithem for five years.—Wow they are wonderful.A. kept B. have kept

问题补充：

—Look at these stamps. Ithem for five years.

—Wow, they are wonderful.

A. kept B. have kept C. have bought

答案：

解析：句意：看这些邮票。我已经拥有他们五年了。——喔，它们好极了。结合语境可知上文描述的是现在已经完成的动作，瞬间动词buy不能和表示一段时间的时间状语连用，故选B.