—You didn’t have so much time, did you?

_______. I had nothing to do all day.

A．Yes, I did

B．Yes , I didn’t

C．No. I didn’t

D．No. I did

下列说法正确的是

A．光导纤维的主要成分是硅

B．Na和Cs属于第IA族元素，Cs失去电子能力比Na强

C．Na₂O₂与水反应，红热的Fe与水蒸气反应均能反应生成碱

D．NaHCO₃、Na₂CO₃、(NH₄)₂CO₃三种固体受热后均能生成气体