1．
将下列单词填入空格，每个单词限填一次
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A. quickly B.
slowly C. with D. bigger E. listening
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Do you know all birds protect themselves by
alwaysand
watching Out for danger? At the smallest sign of it, they will fly away .Birds that cannot fly are often able to
swim fast, or run.
Some birds make themselves look and more dangerous by fluffing(抖动) their feathers.
Another important protection for many birds
is their colours. Their feathers often have co]ours that match the things
around their nests. Some birds change colours the seasons. In the winter they are white
to match the Snow. In the summer they are brown to match the ground.
