题文
The white-flag dolphin, ______ rare Chinese mammal, is in ___ dangerous state of dying out.
| A．the; / | B．the ; the | C．a ; a | D．a ; / |
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The white-flag dolphin, ______ rare Chinese mammal, is in ___ dangerous state of dying out.
| A．the; / | B．the ; the | C．a ; a | D．a ; / |
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