关于沙眼的后遗症与并发症下列哪项是错误的（）
A.脸内翻及倒睫
B.眼干燥症
C.慢性泪囊炎
D.虹膜后粘连
E.角膜溃疡
参考答案：D
--- It’s difficult for the village children to cross the river for school.
--- I think a bridge _______ over the river.
A．should be built
B．is being built
C．has been built
D．was built
In case Customs duties are short--levied or not levied on import or export, the Customs may, within ______ after the date of payment of Customs duties or the date of relesse of the goods, recover the amount of Customs duties short-levied or not levied.
A．six months B．one yearC．two yearsD．four years
