经复核，星级饭店不能达到标准规定的，星级饭店评定机构可根据具体情况______。

A．签发警告通知书

B．通报批评

C．限期改正

D．降低或取消星级

—How do you like the concert given by the "Foxy Ladies"? 

—Exciting, _____ one piece of the music wasn't played quite well. [    ]

A. so

B. though

C. because

D. but