At times, worrying is a normal,( )response to a difficult event or situation--a loved one being injured in an accident for example.A.effecitive B.individual C.inevitable D.unfavorable
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答案：C首先排除D[unfavorable：不宜的, 不顺利的, 相反的, 令人不快的]排除B[individual：个别的, 单独的, 个人的]A[effecitive：情感的, 表达感情的]和C[inevitable：不可避免的, 必然的]都说得过去，但是要看后面的example和它前面说的normal，所以选C