It matters a great deal to Roberta what other people think of her．这句话怎么改可以用how other people think of her．看问题不是让你们翻译
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罗伯特很在意别人怎么看他.
不能这样改.what在这里充当think的宾语,如果还原这个从句,就是other people think what of her.
how只能充当状语.
======以下答案可供参考======
供参考答案1:
其他人如何看待roberta对她有很大的影响
It matters a great deal to Roberta on how other people think of her