She ought to stop reading; she has a headache because she ___________ too long.为什么不填read

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She ought to stop reading; she has a headache because she ___________ too long.为什么不填read

应该填has read,用现在完成时态,因为现在完成时态可以表示过去发生的动作对现在的影响,这边对现在的影响就是“她头痛”