问题
选择题
—Are you reading a book?
— I am writing a letter. [ ]
A. Yes, I am.
B. No, I'm not.
C. Yes, it is.
D. No, it isn't.
答案
B
—Are you reading a book?
— I am writing a letter. [ ]
A. Yes, I am.
B. No, I'm not.
C. Yes, it is.
D. No, it isn't.
B