问题
选择题
—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
答案
答案：D
从上文可知“Andrew将在决赛中拿第一”说明他还在准备，故用现在完成进行时。句意：他一直准备数月了。故选D。