be wild about doing sth.
be high on doing sth.
fall over oneself for doing sth.
be keen on doing sth.
addict to do sth.
be engrossed in doing sth.
be full of enthusiasm about doing sth.
be hot on doing sth.
be sold on doing sth.
enthuse about doing sth.
lost in doing sth
be taken up with doing sth
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