A thick storm of sand(沙尘暴) turned Beijing 1.________ sky into blue last Wednesday.Cars drove with 2.________ lights on.School child walked with their shirts, 3.________ coats and anything else cover 4.________ their nose.Some women wore scarves(头巾) 5.________ over their heads when the storm become stronger. 6.________ "Sand can be sweeping into the air when there 7.________ is a drought(旱灾).Too much trees have been cut 8.________ this years.It made the sandstorm problem worse. 9.________ So something must be done to keep the air nice or 10.________ clean," said the scientists. |