根据句意及汉语提示完成句中所缺单词。
【小题1】At the__________(底部)of the river，we can see some dead fish．
【小题2】When we buy things we shouldn’t use________(塑料)bags．
【小题3】Burning e-waste is_________(有害的)to our health．Please don’t do it．
【小题4】The girl thought they were laughing at her because she was_________(丑陋的)．
【小题5】Workers in some_________(工业)have their hearing harmed by the noise of the