下列词语中没有错别字的一组是[ ]

A．亵渎    涟漪    迥乎不同   广袤无垠

B．诘难    栈桥    芊芊细草   龙吟凤岁

C．羁畔    荫庇   人声鼎沸    怏怏不乐

D．吊唁   轩榭    味同爵蜡    鹤立鸡群

There are fewer teaching positions left in big cities, ____ at the same time there are shortages of teachers in

small towns. [ ]

A. or

B. and

C. so

D. for