用括号内所给单词的适当形式填空。（5分）

小题1:A balanced diet can help us keep__________. (health)

小题2:School is over. Some students are busy __________the floor, (sweep)

小题3:The Greens live on the __________ floor in this tall building, (six)

小题4:Look! The boys and girls are playing games __________. (happy)

小题5:Many kinds of__________ are on show in Changchun Park every year. (flower)