V. Cloze Test 克漏字測驗 10% (每題2分) 
(A)    Dogs have very powerful noses. They have an amazing ability to pick up food and animal smells. They can even sense diseases ( 46 ) plants or people. Dogs are therefore often taught to perform tasks that are very useful to us. One of these is helping to identify trees that have a certain kind of root rot disease. Another is sniffing out drugs in airport luggage, something that specially ( 47 ) dogs can also do.  In some cases, a dog’s sense ( 48 ) smell can even save a person’s life. Rescue dogs, for example, are often ( 49 ) find earthquake survivors. Dogs have also been known to detect when owners’ blood sugar levels fall too low. This ability to sense chemical changes in people’s bodies shows just how ( 50 ) . It’s thus no wonder that they help us out in so many different ways. Dogs truly are our best friends.
【題組】46.
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