根据句意及汉语提示，填入适当单词完成下列句子。

1. There are many trees and __________ (灌木丛) in the garden.

2. There are some __________ (抢劫者) in the building.

3. People have different __________ (能力).

4. It's _________ (必要的) to give them clean water if you want them to be healthy.

5. How _________ (可怕的) the traffic was!