cars are responsible for a good part of air pollution in big cities 翻译

cars are responsible for a good part of air pollution in big cities 翻译 responsible 是Are they cars还是Are these cars? Cars are cheaper than planes planes are ( ) ( ) than cars You are mine,I will be responsible. You are responsible for your own happiness. These cars are the ----(play) What colour are my cars? There are lots of buses and cars Are these toy cars 做肯定回答 Are these cars or buses?回答 They are English cars改为否定句 are lots of cars there and buses Are these cars?作肯定回答 The cars are moving的意思是什么? Are they American cars?改为单数 为啥 填空There are many cars _____the street. where cars your are连词成句