They __________ with each other for two years before they got married

Why didn’t you know it was raining outside? 　　　　— Oh, I was _____ in thought at that time. [ ]

After two years’ research, we now have a _______ better understanding of the disease.

the discussion, Jack ______pointed out that blogs are better than books for their convenience, lower price, and larger range of writing while others kept silent.

How do you find the match between Spain and Switzerland?—It’s ！ Powerful Spain lost the game by 0∶1.