根据句意及所给的中文或音标，写出恰当单词，使句子的意思完整、正确。
He_______(打扫)the floor yesterday．
Xi’an is one of the _______(古代的)capitals in China．
A government is a group of people who make      (决定) about the way people live．
To our great________(惊奇)，the plane has gone missing．
Some _________(公民) in Shanghai have bought this kind of robots．