The teacher’s directions regarding how to write our research paper were very (i) ______ and vague, so when she returned the papers and had graded them all extremely harshly, the class was (ii) ______ that she hadn’t given us a better understanding of her expectations.
Blank(i)处的词与“vague”是并列关系,应该与其意思相近,而meticulous的意思是“一丝不苟的,小心翼翼的”,因此,应该选indefinite(不确定的,模糊的);后半句表明,学生因老师“graded them all extremely harshly”而感觉受到了不公正对待,agitated焦虑的,焦躁不安的;fortuitous偶然的,意外的;indignant则指“angered at something unjust or wrong”,愤愤不平的,最符合句意,因此Blank(ii)处选择D项。