五、克漏字。       When we get wet, we need a towel to get   15   dry. When a dog gets   16   , all it needs is to shake its body. Astudy in 2010 showed that a wet dog can throw off half the water on its body by shaking for less than a second. In fact, this commonact of dogs works better than a washing machine(洗衣機).       The study found that animal shaking begins   17   the head and ends with the tail. During a shake, the animal’s head,body and skin all move. Smaller animals must shake 18 than bigger animals to get water off. For example, in onesecond, a rat can shake   18   times, a dog 6 times, and a bear 4 times. Bigger animals can get their bodies dry with   19   shakes.       For animals, shaking is not just about getting   20   dry. It is also about saving their lives. Being wet makes animalsheavier, and that makes it harder to run. In the animal world, how fast an animal can run often decides whether (是否)it will live ornot. Maybe that’s why the “wet-dog shake” has become a common habit of many animals.
【題組】15.
(A) myself
(B) ourselves
(C) itself
(D) themselves