33．Before she______thethe door, she____what had happened to her computer．
| A．walked;noticed | B．walked; had noticed |
| C．walks; has noticed | D．had walked; noticed |
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33．Before she______thethe door, she____what had happened to her computer．
| A．walked;noticed | B．walked; had noticed |
| C．walks; has noticed | D．had walked; noticed |
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