---I regret _____you John has been fired．

---I can hardly believe my ears．He’s such a fine worker．

A．telling

B．having told

C．to tell

D．to have told

非淋菌性 * * 炎患者，宜选用

A．米诺环素

B．阿奇霉素

C．大观霉素

D．氧氟沙星

E．头孢曲松