When the mother saw her daughter suffering, she felt a sense of ______. (helpless)
【正确答案】:helplessness
【题目解析】:该题中空格处需要填入的词作介词of的宾语,故需要用的名词形式,a sense of helplessness意为“无助感”。
When the mother saw her daughter suffering, she felt a sense of
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