建设项目竣工验收后( )按规定及时向地方城建档案部门移交工程档案。
A．施工单位
B．建设单位
C．监理单位
D．总监理工程师
参考答案：B
Is that hot ____________ cold? [ ]
A. or
B. and
The secretary worked late into night, _____ a long speech for the president. [ ]
A. to prepare
B. preparing
C. prepared
D. was preparing
