填空题
The synthetic fibers produced in that big plant 1 one third of all the fibers turned out in sea.
1、
【正确答案】
1、account for
【答案解析】解析：
The synthetic(合成) fibers(纤维) produced(生产) in that big plant account for(占) one third of all the fibers turned out in the area(地区/领域).. account for(1.解释，说明2.解释3.占百分比4.说明…的原因，是…的原因)