If you’re in Florence, Italy and see a man on a ladder ________ the dust off statues and buildings, don’t worry. It’s just Alessandro Ricci ________ material for his famous smog painting.

A．wipe; accumulating

B．to wipe; to accumulate

C．wiping; gathering

D．wipes; to gather

对于赠与物存在的瑕疵，如果赠与人因( )而未告知受赠人，造成受赠人损失的，应当承担损害赔偿责任。

A．故意

B．过失

C．重大过失

D．不知