题文
_____ I entered, he was _____ in his book and didn’t notice me.
| A．When; devoted | B．While; absorbed |
| C．When, absorbed | D．While, devoted |
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_____ I entered, he was _____ in his book and didn’t notice me.
| A．When; devoted | B．While; absorbed |
| C．When, absorbed | D．While, devoted |
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