elevision was first introduced, the extent_______ it would affect society could not have been foreseen.

I’m sorry. I _________ your printer for such a long time. —Never mind.

the flooding, people were suffering in that area, _______urgently needed clean water, medicine and shelter to survive.

________the new belling sounds gentle and formal, it will be some time before we can adapt to it.[ ]

I will never forget the time________ I lived in the country with my grandparents[ ]