Users practicing this topic

Post date	Users	Rates	Content
2016-10-10	kantanandana	73	Check this topic
2019-10-13	fofty	73	Check this topic
2018-10-03	LiLi_Fleur	3	Check this topic
2016-10-10	kantanandana	76	Check this topic
2018-09-21	Heisenberg 45	81	Check this topic

Topic title: the insecticidal properties of DDT, a whit crystalline compound, were discovered in 1942. during world war II this pesticide was used to control the spread use of typhus and malaria. then in the postwar era it began to be used extensively as an agricultur

Topic category: Integrated TOEFL Writing