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that; it
then; that point (in time); that time
それは私わたくしのかばんです。
That's my bag.
それは昨日きのう買っかったばかりのペンだよ。
That's a pen I just bought yesterday.
それを知っしっていたらもっと早くはやくに教えおしえてほしかった。
If you knew that, I wish you had told me sooner.