Question

what had once happen to tommy teacher???​

Answer 1

Answer:

once Tommy's mechanical teacher had developed fault and its history sector had planned out absolutely the teacher had to be taken away for repairs and it had taken a month to put it in order.

@Hopeless

Answer 2

Answer:

Question 4: What had once happened to Tommy's teacher? Answer: Tommy's teacher developed some snag and its History section was blanked out. So it was taken away for a month for repair.