Elizabeth believed the dog would die if _____ to her cruel owners so she kept it.

A．returning

B．was returned

C．it would return

D．returned

下列可以诱发甲状腺危象的是（）。

A.严重精神创伤

B.未充分准备的甲状腺次全切除手术

C.做其他部位的大手术

D.合并糖尿病

E.停用抗甲状腺功能亢进症药物