用括号中所给单词的适当形式填空
1. People are not the only ones hurt by air __________(pollute).
2. The situation was much __________(bad) than they had expected.
3. Compared with the past, people today are __________(healthy) and live longer.
4. “What do you think is the most important __________(different) between the two words?”
the teacher asked.
5. As everyone knows, exercise can make us feel __________(relax).
