36.A sprain is caused by
A.blood vessels being hurt in the foot
B.ligament fibers of a joint being twisted
C.constantly changing body temperature
D.elevating one's ankle
37.The black-and –blue symptom of a sprain means
A.pressing one's ankle
B.a tight bandage
C.applying a cold pack
D.bleeding under the skin
38.The word"it"in paragraph 2 (line 15) refers to
A.injury
B.pressure
C.swelling
D.ankle
39.Once the initial cold pack is removed, what is to be done?
A.Begin bandaging the ankle
B.Wait 30 minutes and then reapply the pack for 20 minutes
C.Keep the ankle in a position lower than your heart
D.Wait 20 minutes and then reapply the ice pack for 30 minutes
40.The main idea of the passage is to explain
A.how to treat a sprained ankle
B.how a sprain occurs
C.how to bandage an injured foot
D.how to reduce the temperature of a wounded area
参考答案：BDDBA
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