the class -t-for 15 minutes.A:has begun B:has been on

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/22 12:07:54
theclass-t-for15minutes.A:hasbegunB:hasbeenontheclass-t-for15minutes.A:hasbegunB:hasbeenontheclass-t

the class -t-for 15 minutes.A:has begun B:has been on
the class -t-for 15 minutes.A:has begun B:has been on

the class -t-for 15 minutes.A:has begun B:has been on
选B 15minutes是时间段,前面的动词应用持续性动词