I regret __________ you that we’ll have to stop the sports meeting because of the bad weather.

A．telling

B．to tell

C．having told

D．to have told

急性肺脓肿停用抗生素的指征是（）.

A.体温正常

B.脓腔液平消失

C.肺部体征消失

D.咳嗽咳痰消失

E.病灶消失，有纤维条索影