灵域百度云资源第一季:Mary has been to New York since three weeks ago错在哪

Mary has been to New York since three weeks ago错在哪 has been to make has been to 的问题 Bob has been going out with Mary for a year “what has been up to ?”什么意思？ She has been added to your Favorites A problem has been detected and windows has been shut to prevent damage to your computer A problem has been detected and windows has been shutdown to prevent damage to computer. A problem has been detected and windows has been shutdown to prevent damage to computer. A problem has been detected and windows has been shut down to prevent damage