The loss of ability in the mother tongue is mainly caused by the use of electronic devices and a lack of attention to culture.
A. widespread
B. visual
C. ridiculous
D. precious
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(答案→)A. widespread
B. visual
C. ridiculous
D. precious
解析：考查形容词。A．widespread广泛的；B．visual视觉的；C．ridiculous可笑的；D．precious宝贵的。句意：母语能力下降主要是广泛的使用电子设备和缺乏对文化的关注引起的。故A正确。