He likes studying ________ ancient history and can remember many events happening in ________ history very clearly．
A./;/B.the;/C.the; theD./; the在线课程A
不可数名词泛指的时候，前面不用冠词，即使加了描绘性形容词之后如不是特指，仍然不用加the，所以前面不用冠词，in history为固定短语，也不用冠词。