蜜蜂和蝗虫体表都能分泌性外激素，它们都具有社会行为。
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蝗虫不是过群居生活，无社会行为。
一个三角形的高是4.1米，比底短0.5米，面积是（ ）平方米。
根据所给的提示，写出空白处单词的正确形式。
小题1:Lucy is ________ out because she will go to a new school.
小题2: Please brush your ________ before you go to sleep.
小题3: Jim is very kind, he enjoys his little sister.
小题4: I have to study for the test at home
小题5:Peter is a little than Paul.
