---Peter , where did you guys go for the summer vacation?

----We________ busy with our work for months, so we went to the beach to relax ourselves.

A．were

B．have been

C．had been

D．will be

高钙血症时可以选择（）

A.水化利尿

B.二膦酸盐

C.皮质激素

D.降钙素

E.血浆置换