单选题 I haven’t seen Mary these past few days. I’m afraid she＿＿＿＿＿ herself for some time. 的答案

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题目内容：
I haven’t seen Mary these past few days. I’m afraid she＿＿＿＿＿ herself for some time.
题目选项

hasn’t been feeling

is feeling