There is a blackboard____our classroom.Our teacher was stauding the blackboard at this time yesterda

There is a blackboard____our classroom.Our teacher was stauding the blackboard at this time yesterda

题目
There is a blackboard____our classroom.Our teacher was stauding the blackboard at this time yesterday.
A.in front of;in the front of B.in the front of;on C.in the front of;in front of D.in front of;on
答案
c
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