body 2 ( rare errors, good! My suggestion is that you could try to use subjunctive mood)
Financial support, in addition, is critical issue to run all progress. Take Laos PDR and Cambudia as example. They have to borrow a range of budget from others as they can not afford themselves. The financial aids will be used in various sectors such as infrastructural, educational, agricultural and health-care improvement ( all should be changed to noun——infrastructure, education, agriculture and healthcare. That is because you said sectors. It should be paralleled). Building convenient schools costs a lot of money, for example.
1、'Example' has been use in too many times; you could try 'instance'.
2、'used' has also been used in several times. You could convert it into ' distributed '. They express the same meaning regarding to this sentence.
3、Again, the 'example' is too short——your last sentence. Here is my example.
For instance, constructing convenient schools could costs a great amount of money, simply due to the pricey teaching equipment. With no doubt, the school managements can impossibly afford to any advanced techniques without enough money. Therefore, they cannot offer their students the good study environment.