在下列每組單詞中，有一個單詞的括號部分與其他單詞括號部分與其他單詞括號部分的讀音不同。找出這個詞。（）

• A、n(ow)
  
  

• B、kn(ow)
  
  

• C、c(ow)
  
  

• D、h(ow)
  
  

提示:Henry準備去上海開會，打電話到航空公司訂票，工作人員Lillian 接聽了電話。

(L= Lillian; H = Henry)

L: Hello! This is Air China.    51     

H: Hello. I'd like to book a flight from Beijing to Shanghai.

L: Sure.   52    ?

H: This Saturday morning July 12.

L: OK. How many tickets?

H:   53   .

L: So, that's one ticket from Beijing to Shanghai.

H:    54   ?

L: Well, that will be 1 ,030 yuan.

H: OK. Can I book that now?

L: Certainly.

H:   55   ?

L: You' re welcome.

After a heated discussion, they finally agreed on the price（）the new car.

• A、to
  
  

• B、at
  
  

• C、for
  
  

• D、with