中国2010年上海世博会的门票为：平日普通票价格为160元人民币，平日优惠票价格为100元人民币，货币在门票定价中[ ]

①执行价值尺度职能

②是观念上的货币

③执行流通手段职能

④是现实的货币

A、①④

B、③④

C、①②

D、②③

---I haven’t seen Lucy for three days. Is she ill?

---______. Her sister told me she was in hospital.

A．I hope not

B．I’m afraid so

C．I don’t expect so

D．I’m afraid not.