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which (of three or more)
well; now; c'mon
どれが一番いちばん好きすきですか。
Which one do you like best?
どれにしようか迷っまよっている。
I can't decide which one to pick.
どれも美味しおいしそうで一ひとつだけ選ぶえらぶのが難しいむずかしい。
They all look delicious, so it's hard to pick just one.