Question

he is reading a book in the classroom对a book提问

He was reading a book in the classroom．（就划线部分提问）
What___ he___ in the classroom？

Answer 1

答案：was；doing．考查对划线部分提问．根据"was reading a book"正在读书，可知对现在进行时态短语提问用what…doing．中间是一般疑问句，本句含有be动词was，变一般疑问句was提前，答案是was；doing．