The factory has been ________ for three years.A.to open B.op

The factory has been ________ for three years.A.to open B.op .The factory has been ________ for three years.A.to open B.o The factory has been ------------- for two years.A.open B.to the shop__for 5years . A has opened B has open C has been op the factory has been open for twenty years 还是the factory has The factory has been____for two years A open B to open C ope The book shop () for eight years.A.has been open B..has been James ( ) for three years.A.has joined the army.B.has been i The hospital has been open ____ A.for ten years before B.sin this factory has been open for twenty years.为什么是open 而不是open The twins___Canada for three weeks.A.has been to B.have been The factory has been -----for two years.-----怎么填?