She just (type)the letter before the boss came in.

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Shejust(type)theletterbeforethebosscamein.Shejust(type)theletterbeforethebosscamein.Shejust(type)the

She just (type)the letter before the boss came in.
She just (type)the letter before the boss came in.

She just (type)the letter before the boss came in.
She just (typed)the letter before the boss came in.
根据came 可知用一般过