Question

—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

C

【解析】

试题分析：句意：-当老师进来的时候，你能告诉我学生在做什么吗？ -对不起，我不知道。Can you tell me 后面是宾语从句，在宾语从句中，我们应用陈述句的语序（主语+谓语……）,came in 是过去式，所以be也为过去式were。所以选C。

考点：考查宾语从句。