根据句意和汉语注释，写出单词的正确形式。
【小题1】Polluted (污染) air does harm to our health. It’s necessary to keep the air fresh and clean.
【小题2】Our success was far beyond (超过) what we thought possible.
【小题3】This kind of disease spread (传播) so quickly that it drew the government’s attention.
【小题4】The man kept remembering English words every day until he was in his forties (四十).
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解析：【小题1】空气污染危害我们的健康。保持空气空气清新和清洁是有必要的。Polluted污染
【小题2】我们的成功要远远超过我们能想到的。beyond超过
【小题3】这种疾病传播的如此迅速，以至引起了政府的注意。spread传播
【小题4】这个男人每天都坚持记单词直到40岁。forties四十