根据句子意思，用括号中所给单词的适当形式填空。

根据句子意思，用括号中所给单词的适当形式填空。
小题1:My little cousin, Jimmy, is much __________ (slim) than before.
小题2:Today is the old couple’s _________ (forty) wedding anniversary (纪念日).
小题3:How ________ (active) they are donating money to help the sick student !
小题4:It’s ________ (correct) that some grandparents carry school bags for students
小题5:Teenagers should be encouraged to make decisions by (them).