—I knocked over my coffee cup. It went right over _________ keyboard.
— You shouldn't put drinks near _________ computer.
| A．the;不填 | B．the;a | C．a;不填 | D．a;a |
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—I knocked over my coffee cup. It went right over _________ keyboard.
— You shouldn't put drinks near _________ computer.
| A．the;不填 | B．the;a | C．a;不填 | D．a;a |
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