When I got to classroom late, the class had already started and the teacher ___

游客2023-10-05  24

问题 When I got to classroom late, the class had already started and the teacher  ______ (write) maths problems on the blackboard.

选项

答案 had been writing

解析 本题考查动词的用法。write动作发生在get动作之前,应用过去完成时;强调正在进行,用进行时,该句意为:当我迟到到达教室时;老师已经开始上课,并在黑板上写数学题了。
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