He did very badly on the exam. He ___harder.A.must study B.must have studied C.should study D.should have studied本题答案选D,AC为什么错误呢,不能表示之后他必须或者应该好好学习吗?肯请老师解答,感谢!
You may see reflected in his look what it was to be a slave in ancient Rome or the cotton plantations of the Southern United States.这里的 reflected 是名词吗?如何理解 reflected?