CsICl₂是一种碱金属的多卤化物，这类物质在化学反应中既可表现氧化性义可表现还原性，有关该物质的说法正确的是           （   ）

A．在CsICl₂溶液中通入SO₂气体，有硫酸生成

B．Cs显+1价，Cl显+l价，l显-l价

C．在CslCl₂溶液中通入C1₂，有单质碘生成

D．Cs显+3价，I、Cl均显一l价

--- I didn’t see you at the party yesterday. Why?  

--- Because I ________ for an important person from America at that time.

A．was waiting

B．is waiting

C．will wait

D．have waited