I would have met him ______ to the cinema last night.

A．have I been

B．had I been

C．if I am

D．if I have been

年轻恒牙冠折露髓牙根未形成，选盖髓药物（）。

A.氢氧化钙糊剂

B.氧化锌丁香油糊剂

C.聚羧酸水门汀

D.甲醛甲酚

E.磷酸水门汀