Question

【题目】—Can you tell me _____when the teacher came into the classroom?

—Sorry, I don’t know.

A.what were the students doing

B.what are the students doing

C.what the students were doing

D.what the students are doing

Answer 1

【答案】C

【解析】

解析过程：考查带有宾语从句的复合句。句子描述的是老师进来时，学生们正在做的事，用过去进行时态；宾语从句要用陈述句语序。故选C。