根据所给句子及横线后的汉语意思写出正确形式的单词。
小题1:Every day the chimneys of factories pour a great deal of smoke, _______________ (污染) the environment little by little.
小题2:There is no easy _______________ (治愈) for loneliness.
小题3:His company’s exports have increased _______________ (平稳).
小题4:A person is most _______________ (失望) when he is in despair.
小题5:The Russians were_______________ (责备)for the failure of the talks.
