Users practicing this topic

Post date	Users	Rates	Content
2014-10-09	kalyanil1622	70	Check this topic
2017-10-14	ferisotoudeh	80	Check this topic
2018-10-15	Salu	80	Check this topic
2017-01-03	-vv-	76	Check this topic
2018-04-23	mari122	80	Check this topic
2016-11-28	deegayu	76	Check this topic
2016-08-28	mgrajapt	83	Check this topic
2018-09-17	pashmina hira	78	Check this topic
2018-09-21	luga	80	Check this topic
2018-09-15	hoangtuyet	71	Check this topic
2016-09-10	Satyam_gupta02	83	Check this topic
2018-01-10	raniamekhaiel	73	Check this topic
2016-12-10	sh.ghorbanirez…	61	Check this topic
2018-09-15	SOUMEDHIK	73	Check this topic
2017-03-14	toeflibt.ara	81	Check this topic

Topic title: Car manufacturers and governments have been eagerly seeking a replacement for the automobile's main source of power, the internal-combustion engine. By far the most promising alternative source of energy for cars is the hydrogen-based fuel-cell engine, wh

Topic category: Integrated TOEFL Writing