—Why did she speak very ________?       

—Didn't you see she was so ________?        [ ]

A. slow, sadly   

B. slowly, sadly 

C. slow, sad 

D. slowly,  sad

--Who’s singing in the next room? Is it Lucy?

---It       be her. She has gone to New York.

A．can’t

B．must

C．shouldn’t

D．can