They will make about 400 to 500 of these cars for the Expo in 2010 变被动语态
问题描述：
They will make about 400 to 500 of these cars for the Expo in 2010 变被动语态
答
about 400 to 500 of these cars will be made by them for the Expo in 2010
答
About 400 to 500 of these cars for the Expo in 2010 will be made .