城市供热管网敷设方式中，最经济的一种敷设方式为( )。
A．无沟敷设 B．不通行地沟敷设C．通行地沟敷设 D．半通行地沟敷设
参考答案：A
After several weeks, they ______ here with their neighbors. [ ]
A. used to live
B. were used to live
C. got used to living
