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we returned， and we had returned， when did we return， when had we returned， than
that; did that; were when; were when; did
that we were how happy how happy were we that how we were happy how happy we were
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did we begin had we begun were we beginning were we to begin
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that; when when; that that; that when; when
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block to block blocking blocked
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if we finish the homework. when would we come that I liked music best Where we would have the long holiday.
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