Ho Chi Minh City
None of these
By motor bike
560 million dong
40 million dong
120 million dong
230 million dong
To transport food and guns and for soldiers to hide in during the war.
To bury dead people in the tunnels, so that no one could steal them.
To use as secret pathways for getting to destinations in wartime.
To use for drainage systems or for pumping water
Duck embyos,Silk worms,Sparrows,Fermented fish,Deer,Dog and beating snake heart