3  Almost half the center of Paris will be accessible only by foot or bicycle this Sunday to mark World Car-Free Day.  4  This is in response to rising air pollution that made Paris the most polluted city in the world for a brief time. Mayor Anne Hidalgo promoted the first World Car-Free Day last year.
Hidalgo also has supported a “Paris Breathes” day. On the first Sunday of every month, Paris clears traffic from eight lanes of the main road. About 400 miles of streets will be closed to cars. It is expected to bring significant reduction in pollution levels. Last year's car-free day showed a 40% drop in pollution levels in some parts of the city, according to an independent air pollution monitor, reports The Guardian, and sound levels dropped by 50% in the city's center.

 3  本周日，为了纪念世界无车日，巴黎市中心近一半地区将只能步行或骑自行车进入。 4  空气污染的加重曾使巴黎短暂地成为世界上污染最严重的城市，因此该举措是对这一问题做出的回应。安妮·伊达尔戈市长去年发起了首个世界无车日。
伊达尔戈还支持“巴黎呼吸日”。每个月的第一个周日，巴黎都会疏散主干道八个车道上的车辆。大约400英里的街道将禁止汽车通行。预计这将显著降低污染水平。《卫报》报道称，根据一家独立的空气污染监测机构的数据，去年的（世界）无车日显示，该市一些地区的污染水平下降了40%，而市中心的噪音水平下降了50%。

3.在巴黎的世界无车日这一天，将会发生什么？

A)汽车将被禁止进入该市。

B)近半个市中心将禁止汽车通行。

C)公交车将成为街道上唯一允许通行的车辆。

D)行人将能够自由进入该市。

4.什么促使巴黎市长在巴黎发起首个世界无车日？

A)巴黎日益严重的空气污染。

B)日益加剧的全球变暖。

C)不断上涨的汽油价格。

D)难以忍受的交通噪音。