China is a country belonging to the Third World

As is known to us,China is a country belonging to the Third China is acountry belonging to the Third World为什么不用belongs 1.China is a developing country,_________to the third world. China is a developing country,to the third world.A.belong B. China is a developing country (belnging)to the third world.为 求英语大神指点：China is a developing country ，belonging to the thir China is the third ____ country in the world China is the third--country in the world.A:biggest B:the big China is the third ----country in the world.A:biggest B:the 选词填空.China is now ___ (third , the third)country to send a p china is a developing country ,___to the third world but now China is a development country and it ＿the Third World.