下列说法正确的是[ ]
A．空气本来是纯净物，但被污染后变成了混合物
B．矿泉水是混合物
C．液态空气属于纯净物
D．澄清的石灰水是一种纯净物
答案：B
It was with great joy _____ he received the news ____ his lost son would soon return home.
A．because…that
B．that…that
C．because…which
D．that…×
申请人甲向湖南省政府申请行政复议时交了50元的复议费。
