下列词语中书写有误的一项是[ ]
A．清澈 倔强 玷污 堕落
B．点缀 雏形 畅谈 观测
C．慷慨 闲适 禀告 风韵
D．报酬 奥恼 蹂躏 分辩
答案：D
I prefer ______ her some presents ______ her some money. [ ]
A．to buying, to giving
B．to buy, to give
C．buy, give
D．buying, to giving
若输水管内存有空气就可能产生（）。
