問題詳情：
根據句意，寫出括號內所給單詞的適當形式。
is the __________(slim) girl in our class.
is __________(possible) for us to sleep with all that noise.
is __________(terrible) ill. We must send him to the hospital at once.
4.__________ (luck), the young mother found the lost boy in the end.
【回答】
mest ssible ibly ily
知識點：構詞法
題型：完成句子
