In fact, the room was not made to be a gift. It designed for the palace of Frederick I. However, the next King of Prussia, Frederick William I, whom the amber room belonged, decided not to keep it. In 1716 he gave them to Peter the Great. And then , the Czar sent him a troop of his best soldiers. So the Amber Room became part of the Czar’s winter palace in St Petersburg. Late, Catherine II had the Amber Room moved to a palace outside St Petersburg when she spent her summers. She told her artists to add more details in it. In 1770 the room was pleted the way how she wanted. Almost six hundred candles lit the room, and it’s mirrors and pictures shone like gold. Sad, although the Amber Room was considered one of the wonders of the world, it is now missed.第一行：designed 前加was
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(答案→)第一行：designed 前加was
解析：
【小题1】第一行：designed 前加was 本句是一个被动语态，指房子被设计作为Frederick I的宫殿。
【小题2】第二行： whom---to whom 或在belonged后加to 固定搭配belong to属于，可以把介词to提前。
【小题3】 第三行：them---it 本句的it指前面的可数名词单数the room。
【小题4】第五行：Late ---Later 副词later，在句中作状语。Late表示晚，通常作为形容词。
【小题5】第六行：when ----where 本句先行词是表示地点的名词，故使用where引导定语从句。
【小题6】第七行： in it --- to it 固定搭配add…to…把…加到…之上。
【小题7】第七行：how 去掉或改成which/that 本句中的先行词the way，定语从句中缺宾语，故使用which/that。
【小题8】第八行：it’s--- its 使用形容词性物主代词its。
【小题9】第九行： Sad---Sadly 副词sadly在句中作状语。
【小题10】第十行：missed---missing 本句中的形容词missing失踪的。