Asubwayisaneffective的精選

問題詳情：Asubwayisaneffectivewaytosolvetrafficproblemsin________bighasevidentadvantages，suchas________speedandconvenience.A．the；the B．a；theC．a；/ D．the；a【回答】C知識點：冠詞題型：選擇題...