He was't sure who ____(help ).用所给词的适当形式填空,应该怎么填?

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Hewas''tsurewho____(help).用所给词的适当形式填空,应该怎么填?Hewas''tsurewho____(help).用所给词的适当形式填空,应该怎么填?Hewas''tsurewho

He was't sure who ____(help ).用所给词的适当形式填空,应该怎么填?
He was't sure who ____(help ).用所给词的适当形式填空,应该怎么填?

He was't sure who ____(help ).用所给词的适当形式填空,应该怎么填?
to help

would help