1 . 用方框中所给词语的适当形式填。每词限用一次。

stamp       pollute       difficult       neither       suffer from

1. Air ________ can cause breathing problems for anyone.
2. He ________ great pain in his left leg since accident happened.
3. I find it a lot ________ to get a job than suppose.
4. I need one more ________ to complete my collection.
5. ________ my father nor my mother likes playing computer games.