Jack has been skating four hours ago .A sinceB. about C.for about D. in

发布时间:2020-08-22 02:04:40

Jack has been skating      four hours ago .
A since     B. about      C.for about    D. in

网友回答

解析:在完成时中常用for和since引导时间状语。Since+点时间,for+段时间。
以上问题属网友观点,不代表本站立场,仅供参考!