22秋学期(高起本1709-1803、全层次1809-2103)《大学英语(一)》在线作业-00001 试卷总分:100 得分:100 一、单选题 (共 50 道试题,共 100 分) 1.A: ( )is David from? B:I think he's an American. But I'm not sure. A.Where B.What C.How 2.Before ____ a promotion, Sam had presented a report on how the s…
