题目

There were few doctors, _____ he had to work very hard _____ his own.    A. and; in         B. because; at      C. so; on           D. when; for 答案：C下面属于在河南省分布的世界自然、文化遗产是A．秦始皇陵及兵马俑坑B．龙门石窟、安阳殷墟C．云冈石窟D．泰山和曲阜孔庙、孔府、孔林