--Did you visited the military museum?
--Yes. Not until quite recently ________ any idea what a guided missile was like.
| A．had I have | B．did I have | C．I had | D．I have had |
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--Did you visited the military museum?
--Yes. Not until quite recently ________ any idea what a guided missile was like.
| A．had I have | B．did I have | C．I had | D．I have had |
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