i_english for many years before i entered the university

问题描述:

i_english for many years before i entered the university
A have le arned
B have be en learned
C had learned
D had be en learned

C
这句话显然是完成时
其中B和D是完成时被动语态,与我学英语的主动语态不符,所以不选
而看后半句,是before I entered the university,是过去式,所以前面要用过去时,答案便显而易见是过去完成时了.所以选C