问题
选择题
— Mary, could you help me?
— Wait a moment. I _____. [ ]
A. read a book
B. did my homework
C. was watching TV
D. am cooking dinner.
答案
答案：D
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— Mary, could you help me?
— Wait a moment. I _____. [ ]
A. read a book
B. did my homework
C. was watching TV
D. am cooking dinner.
答案：D