答案：

　　26.C，本題為細節(jié)題。由文章第一段“Do you know ... have their special colors？ Colors are used mainly to protect themselves.”可知答案為 C。

　　27.B，本題為細節(jié)題。由文章第二段“Some other insects with different colors ... by others. So they have to hide themselves in the day and appear only at night.”可知答案為 B。

　　28.D，本題為細節(jié)題。由文章第三段“ Bears， lions and other animals ... by hunters（獵人). This is because they have the colors much like the trees.”可知答案為 D。

　　29.B，本題為細節(jié)題。由文章最后一段“While the liquid spreads over (散開)， its enemies(敵人) can‘t find it. “可知答案為 B。

　　30.A，本題為主旨大意題。本文主要講了各種各樣的動物或者昆蟲是如何保護自己的，可知答案為 A。