单选题 With the development of the internet, the number of teenagers never of hardly reading for fun has ＿＿＿＿＿＿＿＿ greatly in the last decade. 的答案

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题目内容：
With the development of the internet, the number of teenagers never of hardly reading for fun has ＿＿＿＿＿＿＿＿ greatly in the last decade.
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