Sure, here are the sentences with the correct forms of the words provided in parentheses:

82. Air **pollution** does a lot of harm to our life. (pollute)

**Limiting** the air **pollution** must be done to save our environment. (pollute)

87. The train didn’t stop because of its **fullness**. (full)

88. They often chatter **gaily**. (gay)

91. This chewing gum can keep your **breath** **fragrant**. (fragrant)

92. Heavy smoking makes him **breathless**. (breathe)

101. He always wants to **simplify** any problems. (simple)