This kind of T-shirt is ______.

Do you know where David is? I couldn’t find him anywhere. – Well. He _____ have gone far — his glasses are still here.

I think____ important to learn English well.

If it were not for the fact that she_______sing, I would invite her to the party.

Mary looks down today. What is up?—Well，________happened between Mary and me is none of your business.