导航:题目详情 | 答案解析 | 相关问题 | 最新问题 A.20-yearB.a 20-year periodC.20-yearsD.a 20 years 外语类 2019-10-22 16:43:39 英语考试 已帮助 人 A.20-yearB.a 20-year periodC.20-yearsD.a 20 years 热搜:m20螺距为2.5牙深是多少 答案解析 难度★★☆ 搜索 正确答案:B解析:此题属于语法题,a 20-year period意为“一个20年的时期”,故选项B a 20-year正确。其他选项:A 20-year缺少冠词;C 20-years和D a 20 years单复数形式错误;均不符合题意。 相关问题 1、How long did Ethbell teach minority students?A.8 years.B.16 years.C.20 years.D.30 years. 2017-09-05 2、Lisa is a () girl.A. ten-yearB. ten-yearsC. ten yearD. ten years 2019-06-28 3、She is ill ___A.all the yearB.whole year roundC.all the year roundD.all year round 2019-06-28 4、The tropical year differs from which year by 20 minutes ().A.Astronomical yearB.Natural ye 2019-07-06 5、????CIn January 2004 a 20-year-old woman ran a red light while talking on a cell phone. H 2019-09-15 6、Before 20 years old I had______.A. those unexpect 2020-04-28