问题详情：
— Do you know what Millie and Andy were doing at 8 o’clock yesterday?
—Yes. While Millie ______ TV, Andy ______ a book in the bedroom.
A. was watching; was reading B. watched; read
C. was watching; read D. watched; was reading
【回答】
A
知识点：动词时态
题型：选择题
