冷加工金属经再结晶退火后，下列错误的是（）

A．其晶粒形状会改变

B．其机械性能会发生改变

C．其晶格类型会发生改变

D．其晶粒大小会发生改变

— The mountain village is so beautiful.

— Yes. Moreover, ________the villagers live, there is fresh air.[ ]

A. that  

B. where  

C. when  

D. whether