Ms. Nyguen had submitted her résumé before she ______the position was filled.

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问题 Ms. Nyguen had submitted her résumé before she ______the position was filled.

选项 A、will know
B、knows
C、has known
D、knew

答案D

解析 A past action that happens after a previous past action is in the simple past tense. Choice (A) is the future tense. Choice (B) is the present tense. Choice (C) is the present perfect.  
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