問題詳情

四、綜合測驗題：﹙12題，每題 2分，共24分﹚1. Dogs that have a great sense of smell are sometimes chosen to become sniffer dogs. 39. they are chosen, they are trained before they are sent out on a mission. You may 40. sniffer dogs in the baggage claim areas of airports. However, you may not be aware of 41. at smelling things. They have the ability 42. things that have been combined with other ones on purpose. In one case, a sniffer dog was able to smell 43. drugs in a woman’s bra. In another case, a sniffer dog sat by a wall that was very clean. As it 44. , a murderer had wiped a drop of blood off the wall, but the dog could still smell it. The more experienced a sniffer dog is, the better it is 45. helping people find things or solve crimes. Next time you see a sniffer dog, please give it a big hand for all its hard work.
39.
(A) Before
(B) Until
(C) As
(D) Once

參考答案

答案：A[無官方正解]
難度：適中0.6
統計：A(3),B(0),C(1),D(1),E(0)

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