B. 请根据句意从方框中选择合适的单词，并用其适当形式填空，使句子通顺。

Lucy said that Mr. White offered her some _________ suggestions.
Those volunteers always think more of others than of _________  .
Mr Yang, I fell ill last night and didn’t finish my homework. I’m ________ sorry about it.
—Why do the beautiful birds ________ so fast?
—Because of lack of food.
It’s known to us all that ________ need food, water and air to survive.