下列组织中，（）是行政执法主体。
A、各级人民法院
B、各级学校
C、各级烟草专卖局
D、各级政府法制办公室
参考答案：C
— Hello! May I speak to Kate?
— Sorry, she isn't here now. She ______ to Shanghai. [ ]
A. went
B. has been
C. has gone
装卸电杆等物件应采取措施，防止（）。
