观察右边漫画《价格战》，回答下列问题。

人类的生活和生产都离不开金属材料．

（1）铁锅、铝锅是生活中常用的炊具，如图是铁锅的示意图．铁锅生锈的条件是：铁与空气和____直接接触；炒菜时铁锅中的油着火可用锅盖盖灭，其原理是____ ．铝锅轻便、耐用，其原因是____ ．

（2）某同学为了验证镁、铁、铜的活动性顺序，他选择了打磨过的铁丝，你认为他还需要的另外两种溶液是____ ．

根据下列句子所给的提示及句意，写出句子空缺处各单词的正确形式。
1.I never feel ____ (无聊的) or unhappy when he is with me.
2.He lives____ (独自), so he often feels ____(寂寞).

3.This dress is very popular this year. Do you know who the____ (design) is?
4.He didn't ____(出现) until ten o’clock last night.
5.They are having an ____ (采访) with Mr. Green about the changes in his hometown.
6.Traveling____(到国外) has become fashionable.
7.The castle looked____ (shine)and beautiful under the fireworks.