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。
小题1:He_______(打扫)the floor yesterday．
小题2:Xi’an is one of the _______(古代的)capitals in China．
小题3:A government is a group of people who make      (决定) about the way people live．
小题4:To our great________(惊奇)，the plane has gone missing．
小题5:Some _________(公民) in Shanghai have bought this kind of robots．