We donot know what to solve these problems.改错,并订正,

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Wedonotknowwhattosolvetheseproblems.改错,并订正,Wedonotknowwhattosolvetheseproblems.改错,并订正,Wedonotknowwha

We donot know what to solve these problems.改错,并订正,
We donot know what to solve these problems.
改错,并订正,

We donot know what to solve these problems.改错,并订正,
We don't know how to solve these problems.

what 改为 how

We don't know how to solve these problems.
我们不知道如何解决这些问题。
如何应该用how

we donot know the solution of these problems.

what改成how
We donnot know how to solve these problems.
这是一个宾语从句。联系词应该是how。如果用what,则从句中缺少宾语。