Yes, Civil 3D can open shapefiles. This is a very useful feature, as shapefiles are a common format for GIS data. In order to import a shapefile into Civil 3D, you will need to use the MapImport command. This can be found in the Insert menu, or by typing “MapImport” into the Command prompt. Once you have selected your shapefile, you will need to select the Coordinate System that it is in. Civil 3D uses the Universal Transverse Mercator (UTM) coordinate system by default, so if your shapefile is in another system, you will need to select the appropriate transformation. Finally, you will need to specify the units that your shapefile is in. Once you have done this, your shapefile should be imported successfully into Civil 3D.