23．We still remember once__________round the famous tower when we were young.

A．having taken

B．to be taken

C．having been taken

D．to have taken

下列哪些选项的法规须报上一级有关机关批准后才能实施或者生效

A．省、自治区、直辖市的地方性法规

B．自治法规

C．省、自治区人民政府所在地的市和国务院批准的较大的市的地方性法规

D．经济特区的法规