2. 外语
  3. When I came into the classroom, the teacher ______ something on the blackboard.

When I came into the classroom, the teacher ______ something on the blackboard.

admin2009-07-17  51
问题 When I came into the classroom, the teacher ______ something on the blackboard.
选项 A、is writing
B、was writing
C、wrote
答案B
解析 谈到过去某一刻正在发生的动作须用过去进行时。
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