二、单项选择：(共15小题，满分15分)
21．It rained hard yesterday．The father made the children__________ in the room．
    A．to stay         B．stay           C．staying          D．stayed
22．The Smiths have visited two famous cities．One is in Japan and________ is in China．
    A．the other       B．another        C．other            D．others
23．It was_________ amazing day，but________ best part was the dancing party．
    A．a；不填       B．art；the        C．不填；the       D．an；a
24．I think________ necessary for us to learn a foreign language．