---Can you see __________ bright light in the sky?
--Yes, I think it’s __________ UFO.
| A．a, an | B．the, an | C．the, a | D．a, the |
---Can you see __________ bright light in the sky?
--Yes, I think it’s __________ UFO.
| A．a, an | B．the, an | C．the, a | D．a, the |
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