It (31) ________ (say) Cu Chi Tunnels are part of a massive war museum in Ho Chi Minh. Visitors (32) (offer) a sneak-peek at the underground life of Vietnamese soldiers back in 1948. The site has over 120km of underground tunnels, with trapdoors, living areas, kitchens, storage facilities, armory, hospitals, and command centers. After the war against the French, it (33) (claim) that Vietnamese soldiers expanded the tunnels and included effective air filtration systems, which helps them survive the Cu Chi carpet-bombings. It (34) (consider) that Cu Chi Tunnels are now one of Ho Chi Minh’s most iconic attractions. You can enjoy plenty of activities during your visit. A popular option is following the narrow routes of the underground tunnel. Before (35) ____________ (enter) the underground tunnels, a short film of Cu Chi Tunnels (36) (show) to visitors so that they understand how the tunnel system works. It (37) (expect) that parts of Cu Chi Tunnels (38) (cement) and (39) (widen) so that the crawl is less harrowing than it (40) ____________ (be) in the