問題詳情
79. According to the report, poorwithin the class to ensure a clean pleasant classroom.s____n is threatening the public health in Africa. In fact, sixty-two percent ofAfricans have no access to a proper toilet.
參考答案
答案：C
難度：適中0.66129
統計：A(49),B(46),C(246),D(4),E(0)