根据句意和汉语解释，写出单词的适当形式。
【小题1】After hearing it, the doctor put down his __________（筷子） and left at once.
【小题2】As we all know, seed are often ____________（使散开）by wind.
【小题3】_____________（比较）with your city, our city is less polluted.
【小题4】Why have you bought so many ____________（电子的）products for such a little boy?