题目

阅读下面句子，根据句子内容填空。在未给提示词的空白处仅填写一个单词，在给出提示词的空白处用括号内所给词的正确形式填空。【1】I’ll never forget the day ________ I won the first prize in the 100-metre race in school.【2】No one can avoid ________ (make) mistakes while learning a foreign language.【3】Last night, there were millions of people ________ (watch) the live TV programme.【4】Many countries are setting up national parks ________ animals and plants can be protected.【5】________ makes the book so extraordinary is the cr下列有关水的说法中错误的是（   ）A．自然界的水都不是纯净物B．用肥皂水可鉴别硬水与软水C．用活性炭吸附净化水发生了化学变化D．水分子保持水的化学性质