男性，60岁。突感心悸伴呼吸困难1天，心率160次／分，节律不整，心电图示“房颤”。治疗首选 （）

A.合心爽

B.心得安

C.西地兰

D.利多卡因

E.奎尼丁

It was only in 1997 _______ J.K Rowling finished the first Harry Potter story, which is known

as Harry Potter and the Sorcerer's Stone.[       ]

A. when        

B. what          

C. which            

D. that