During World War II, the government _(took over/ signed contracts with/ closed down many) private American industries to help the war effort. US automobile manufacturers _(stopped building cars/ built more cars/ shut down their factories) during the war at the government's request.

Wartime production was boosted by _(government owned companies/ private businesses/ the government and private businesses working together).

During the war, people's working hours _ (increased/ decreased/ stayed the same).