13 ( ) 1 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 ( ) 2 Lucy sits____ the third row, ____Jim's left. A. on; on B. in; at C. at; in D. in; on ( ) 3 Jiangsu is___ the east of China, but Japan is ___ the east of China. A. to; in B. in; to . C. on; to D. to; on