—I’m sure Andrew will win the first prize in the final.—I think so. He ___________ for it for months

题目简介

—I’m sure Andrew will win the first prize in the final.
—I think so. He ___________ for it for months.

A．is preparing

B．was preparing

C．had been preparing

D．has been preparing

题型：单选题难度：偏易来源：不详

根据语境可知，Andrew从过去到现在一直在准备，所以用完成进行时。