A.what B.how C.why D.when 解析：what作do的宾语，意思是“她不知道该怎么做”。 ... But one English word often has many translations in a foreign language and one ... very often can't help to improve writing 解析：从句中画线部分得知。 .... 该 行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。 ...

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