Question

【题目】 After the discussion, the students asked their teacher 　　　 next.

A. which to do B. what to do C. how to do D. when to do

Answer 1

【答案】B

【解析】动词不定式和疑问代词或副词连用充当句子的某个成分。经过一番讨论，学生们问老师下步该怎样做。