People had to use bicycles to go to the city center.(改为同义句)
People had to use bicycles to go to the city center.(改为同义句) People__ __to use bicycles to
People had to use bicycles to go to the city center.(改为同义句)
People__ __to use bicycles to go to the city center.
People__ __to use bicycles to go to the city center.填must be可以吗