The twins___Canada for three weeks.A.has been to B.have been

The twins___Canada for three weeks.A.has been to B.have been The twins ____ Canada for three weeks. A.has been to B.have .The factory has been ________ for three years.A.to open B.o The factory has been ________ for three years.A.to open B.op The museum has been open to the public for about two weeks.a he has been away for three weeks.写出同义句, I have been occupied for the last weeks to pay you a vist句子里 I have been occupied for the last weeks to pay you a vist My mother____college for over three year.A has been to B has James ( ) for three years.A.has joined the army.B.has been i they have been in nanjing since ______.A.three weeks B.three The Smiths ___China for three years.a.have come b.have been