--- Lydia, what did our headteacher say just now?

--- Every boy and every girl as well as the teachers who       to lead the group

      asked to be at the school gate before 6:30 in the morning.

A．is; is

B．are; are

C．are; is

D．is; are

下列哪种静脉麻醉药最易引起喉痉挛（）

A.氯胺酮

B.硫喷妥钠

C.丙泊酚

D.咪达唑仑

E.依托咪酯