—Where's the map?
—It's _______ your grandparents ' room, _______ the wall．
| A．of, on | B．in, on |
| C．on, in | D．in, of |
—Where's the map?
—It's _______ your grandparents ' room, _______ the wall．
| A．of, on | B．in, on |
| C．on, in | D．in, of |
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