According to a recent survey, using too many electric devices like phones is the ________ of having poor eyesight.

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1. According to a recent survey, using too many electric devices like phones is the ________ of having poor eyesight.

A . cause B . result C . cost D . idea

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牛津版（深圳·广州）九年级下学期Unit 3 The environment 综合测试卷