Which of the following is true about Madrid's clean air zone? ( )

(单选题)The Public Transport Commission's commitment to running our (单选题)After the exploration the army got the building（ ）and the (单选题)The unemployment figures（ ）last June, no doubt due to the (单选题)A senior management committee believes that we should immedi (单选题)Educational expenses are tax-deductible（ ）the taxpayer ca (单选题)The Springborg Hotel chain's attention to detail and busines (单选题)Buses have routes. They（ ）and（ ）people at different pl (单选题)Unfortunately, any benefits gained by lowering prices never（ (单选题)Any new staff member who has not already submitted a recent (单选题)The party（ ）since the new year .