题文
In recent years________global warming is becoming ________ concern for people all over the world.
| A．the；the |
| B．/；a |
| C．/；/ |
| D．the；/ |
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In recent years________global warming is becoming ________ concern for people all over the world.
| A．the；the |
| B．/；a |
| C．/；/ |
| D．the；/ |
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