---Cathy, are you going to buy a flat in Shanghai?

---You must be joking. I can’t __________ one there.

A．spend

B．pay

C．afford

D．cost

分别从褒扬和批评的角度写一句话。     

例如：蜡烛     

褒扬：每燃烧一段，都贡献一份光热。     

批评：过分地炫耀，终会被泪水淹没。     

彩虹

褒扬：                                                                                                   

批评：