题目内容

The teacher is already standing here. Do you know when she ______?
A．comesB．came
C．is comingD．was coming
B

试题分析：句意:老师已经站在这儿了。你知道她是什么时候来的吗？come来，是一个动词。根据句意可知，老师现在已经站在这里了，因此来这个动作应该是过去发生的，应该用一般过去时，故选B。A是一般现在时，表示经常性或习惯性的动作；C是现在进行时，表示此刻正在发生的事情；D是过去进行时，表示过去某时正在发生的动作。
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