— Rose writing a letter? — Yes she .A. Does ; doesB. Is ; doesC. Is ; isD. Does ; is

问题补充：

— Rose writing a letter?

— Yes, she .

A. Does ; does

B. Is ; does

C. Is ; is

D. Does ; is

答案：

A. Does ; does

B. Is ; does

(答案→)C. Is ; is

D. Does ; is

解析：句意：--露丝正在写信吗？--是的，她在写。因为问句用的是现在进行时，所以答语也应该用同样的时态，其谓语动词的形式是be doing，回答时还是用be来回答。故选C。