他们建造新楼房来提高土地的等级.They upgraded the land by improving it with new buildings.我们根据阅读能力将学生划分等级.We grade the students according to their reading ability.牛奶分等级出售.The milk is sold in grades....
So far 57 have taken the test and all have been negative.到目前为止，参加测试的有57人，测试结果均呈阴性。He suggested a link between class size and test results of seven-year-olds.他认为7岁大的学生的测试分数和班级的规模有关系。A positive pregnancy test soon confirme...