英语小题3道哦I learn that she____ Shanghai for several daysA.has g

英语小题3道哦
I learn that she____ Shanghai for several days
A.has gone to B.has been away from
选什么,又为什么?
Although adult education in the United States began a century ago,
_______ cheif growth has taken place since the 1920's
A.its B.which
这不是定语从句吗?
---Hi,Bill,you look tired
---I am tired .I ____the living room all day
A.HAVE Been painting B.have painted
是不是两个都可以,还是哪个更准确呢,为什么?