----Why didn’t you see me wave to you then ?

----Oh, If so. I must say sorry. I think I____ in the other direction.

A．looked

B．was looking

C．have looked

D．am looking

下述哪项与理想的静脉全麻药相符合（）

A.全麻药为气体

B.可在体内滞留较长时间不会代谢

C.在体内不断再分布

D.绝大部分从体内以原形排出

E.对呼吸循环无明显影响