男性，66岁。发作性心前区压迫性疼痛10年余，平时活动均能行走500米。近日来三四百米即可诱发，最可能的诊断是（）

A.初发劳力性心绞痛

B.变异性心绞痛

C.稳定劳力性心绞痛

D.恶化劳力性心绞痛

E.心脏神经官能症

Every boy and every girl as well as some teachers who_____ to visit the museum______ asked to be at the school gate before 6 :00 in the morning.

A．are ; are

B．is; is

C．is ;are

D．are ;is