【题目】—It is said that John’s paper got an A.
—He deserves it．He _________ a lot before he handed it in.
A．prepared B．prepares
C．had prepared D．has prepared
在线课程【答案】C
【解析】It’s said that…,据说。。。paper,n.,论文。根据谓语准备（“prepare”）发生在动作得到A等级（“got an A”）之前，也就是过去的过去。用过去完成时，had done。