几道初三英语改变句子的题目急啊~~~~~~~

问题描述:

几道初三英语改变句子的题目急啊~~~~~~~
1、America's economy developed quickly from 1900 to 1999.
America's economy developed quickly in () ()( )
2、Chinese is spoken by the largest number of people in the world.
Chinese( ) the largest number of ( ) in the world.

the 20th century
has speakers