Question

When the students came into the classroom, the teacher ___ on the blackboard.

A.was writing
B.is writing
C.wrote

Answer 1

【答案】：A
A【解析】本题考查动词时态。when引导的从句是一般过去时，主

句中的动词若是延续性动词，那么该动词要用过去进行时态。