—Sorry, Sir. I can't remember all the new words we learn every day.
—________. Practice more.
A:I'm afraid not
B:It's hard to say
C:You are not alone
D:All right
南水北调工程把我国长江水分三路调到华北地区。
《长生殿》描写了唐朝天宝年间皇帝昏庸、政治腐败给国家带来的巨大灾难,其几乎导致唐王朝覆灭;《桃花扇》将明末侯方域与秦淮艳姬李香君的悲欢离合同南明弘光朝的兴亡有机地结合。这说明( )