-- Where ______ John ______?

-- To the library. He ______ there for an hour.

[    ]

　　A. has, been, has gone   B. has, gone, has been

　　C. did, go, went　　　　 D. did, be, went

--Where is John?

--He_________ to the library and he_________ there for an hour．

A．has been，has been                B．has gone，has been

C．goes，went                              D．has been，will be

一Where is John?

—He has gone to the library．He ________there for an hour．

A．has gone            B．has been             C．went             D．goes