第1个回答 2010-09-16
our classroom is on the third floor, in the front of which there is a big blackboard本回答被网友采纳
第2个回答 2010-09-16
our classroom is on the third floow in front of which there is a big blackboard.
第3个回答 2010-09-16
our classroom is on the third floor , and in front of there is a big blackbord.
第4个回答 2010-09-16
our classroom is at the third floor ,and there is a big blackball in front of it