本田系列所有车型新款:请问"I _ been learning English for four years."中，（ ）应选哪个？A.have B.am C.were

请问"I _ been learning English for four years."中，（ ）应选哪个？A.have B.am C.were 请问一下I have been to shanghai 请问一下I have been to shanghai I've never been to beijing, but it's the place _. 请问 _ _ _ I would have been drowned . 写完整: _ I _ _ _ I _ _ : belong to me _ I _ _ : belong to me 请问“I've been told that+从句”中that可不可以省略？