"which" vs "as he often was"

[Guinevere]

When excited, ( ) he often was, he cried loudly.

The answer was "which". But isn't "as" as correct as that? :wink:

[Yankee]

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Yes, it is possible to use either which or as in that sentence.
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"Nearly all men can stand adversity, but if you want to test a man's character, give him power." ~ Abraham Lincoln