短文改错。
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.