Tom sits the classroom while John sits the room. A. in front of; at back of B. in the fron——青夏教育精英家教网—

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Tom sits ____ the classroom while John sits ____ the room.

A. in front of; at back of
B. in the front of; at the back of
C. in front of; at the back of
D. in the front of; at back of

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