分类：教育/科学-学习帮助
问题：英语~~I___violinlessonseverytwowee 
I ___ vlin lessons every two weeks ,but I think I'll make it every week from next monthA am havingB haveC have hadD have been having说下原因
回答：答案D
因为是由过去一直持续到现在,所以要用过去进行完成时，