Question

What had once happened to Tommy's teacher?
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Answer 1

Explanation:

Tommy's teacher developed some snag and its History section was blanked out. So it was taken away for a month for repair.

Answer 2

Question :-

What had once happened to Tommy's teacher ?

Answer :-

Tommy's teacher was taken away for nearly a month because the history sector had blanked out completely. So, Tommy had nothing to do during that period. He only relaxed and enjoyed.

Hope it helps :)