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).