失去雏鸟的红雀给金鱼喂食，像喂自己的雏鸟一样，该行为的正确解释是（ ）
缺钙或缺乏维生素D容易患（ ）
选词填空，用单词适当是形式填空
draw, look, see
①I can't ____ my pen. Where is it?
②You can ____ a beautiful doll.
③ ____, some birds can fly in the sky.
