Why get upset just because you got one bad grade?

　　何必因?yàn)橐淮纬煽儾缓镁拖氩婚_呢？

　　All the materials used were of the highest grade.

　　使用的材料全是優(yōu)質(zhì)品。

　　You get an A grade for scores of 75 and over.

　　75分及75以上的分?jǐn)?shù)就是優(yōu)等。

　　Your grade will be based on four papers and a final exam.

　　你的成績將根據(jù)四篇論文和期末考試決定。

　　A high proportion of candidates get low or unclassified grades.

　　有很大一部分考生得分很低甚或不獲評分。