cars moved very slowly in the 1920,s ,but they ——move more quickly than in 1910横线处填:did do actually automatically?

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cars moved very slowly in the 1920,s ,but they ——move more quickly than in 1910横线处填:did do actually automatically?

cars moved very slowly in the 1920,s ,but they ——move more quickly than in 1910横线处填:did do actually automatically?
cars moved very slowly in the 1920,s ,but they ——move more quickly than in 1910
横线处填:did do actually automatically?

cars moved very slowly in the 1920,s ,but they ——move more quickly than in 1910横线处填:did do actually automatically?
did
此句为强调句.强调谓语动词MOVE.由前半句知此句为一般过去时,故选DID