问题补充:
----How long has Sam been skating?
------Hefor five hours.
A have been skating B has been skating C was skating D has been skated
答案:
解析: 略
时间:2019-04-02 13:54:42
----How long has Sam been skating?
------Hefor five hours.
A have been skating B has been skating C was skating D has been skated
解析: 略