5.315.5 __________________________________

4.4,816 __________________________________

3. 63,405 ________________________________

2.7,888,999，654 __________________________

 用英语写出下列数字。

1.33,533，323 ___________________________

5. As we know,America is a        (develop) country.

4. He had a traffic accident.      (luck)， lie wasn't badly hurt.

3. Now the traffic problem in the city is       ( serious ) than before.

2. Our school has        ( carry ) out many rules to make students work hard.

1. India has the _____ ( two ) largest population in the world.