Users practicing this topic

Post date	Users	Rates	Content
2017-01-22	wsxedc	65	Check this topic
2016-10-22	nfsedaghat	86	Check this topic
2018-08-22	rk21	80	Check this topic
2018-07-17	ersinb1	76	Check this topic
2017-11-09	fahim135	60	Check this topic
2018-07-13	Beex	85	Check this topic
2017-12-23	danae27	85	Check this topic
2017-11-09	fahim135	70	Check this topic
2017-11-20	ferisotoudeh	80	Check this topic
2017-08-13	usoulo1	78	Check this topic
2017-11-09	fahim135	70	Check this topic
2017-12-23	danae27	90	Check this topic
2018-06-03	Fetemeh	86	Check this topic
2018-08-03	Aftab1	60	Check this topic
2017-02-04	dhani	75	Check this topic

Topic title: Starting in the 1960s and continuing until the 1980s, sailors in Russian submarines patrolling the North Alantic and Arctic Ocean would occasionally hear strange sounds. These underwater noises reminded the submarine crews of frog croaks, so they called t

Topic category: Integrated TOEFL Writing