China is a developing country while America is a developed country.为什么第一个用developing第二个用developed

您好!一个句子的语法不明白,如下：Planting is the most important part of creating a beautiful environment,replenish nature and developing the national economy.其中replenish为何不是replenishing,前面的creating和后面的developin china is a l_ country. A:Panda come from China B:China is the ()()panda Tibet,a ( )of China ,is in the west of China. tis is a map of china.对of china 提问 填空 she is a _(china) girl. china is a（ ） and beautiful congtry China is a d---------- country填词 China is a developing country 同义 Taiwan is a beautiful i__of China China is a ____(power)country Shanghai is a m___ city in China. This is a china map.找出错误 China is country with a long h______ This is a m什么 of china Taiwan is a p______ of China china is still a（ ）country Tibet IS a part of China