下列交际语言，最为得体的一项是 (　　)

Why was it so noisy on the fourth floor just now—Oh, I forgot to tell you. Many children _______ Ann’s birthday there.

My English teacher can _____ English very well.

What was considered impolite years ago hasbecome ________now

Tire patient looks much better．_____ is it that has made him _____ he is today?—Perhaps the special medicine and his family’s patient care．