I don't know the k--------- to those problemsI don't know the k--------- to those problems,Can you help me?Sure.

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Idon''tknowthek---------tothoseproblemsIdon''tknowthek---------tothoseproblems,Canyouhelpme?Sure.Idon''

I don't know the k--------- to those problemsI don't know the k--------- to those problems,Can you help me?Sure.
I don't know the k--------- to those problems
I don't know the k--------- to those problems,Can you help me?
Sure.

I don't know the k--------- to those problemsI don't know the k--------- to those problems,Can you help me?Sure.
key
I don't know the keys to those problems.
我不知道解决这些问题的关键是什么.

key,问题的关键