They have been skating __________. A．for three hours B．since three hours ago C．three ho
Theyhavebeenskating__________.A．forthreehoursB．sincethreehoursagoC．threehoursagoD．sin...
They have been skating __________. A．for three hours B．since three hours ago C．three hours ago D．since three hours
展开
1个回答
展开全部
| A |
| for 一段时间，为现在完成时态的时间标志，故选答案为A |
本回答由提问者推荐
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
