---We’ve seen many more days of blue skies recently. ---True. But back in 1998, ________ Beijing started its “Defending the Blue Sky” program, the city only ________ about 100 days a year.
---Where shall we go and enjoy ourselves in summer? --- Of course, Qinhuangdao. ________ next to Bohai Sea ________ a coastline of 124 km, it is a perfect place to go in summer.