问题描述：
1._____at the back of the classroom,...
1._____at the back of the classroom,it is very hard for him to ____what is written on the blackboard.
A.Seated,see clearly B.Having seated,make out
C.The students seated,make out D.Sitting,see clearly
D的区别
1._____at the back of the classroom,it is very hard for him to ____what is written on the blackboard.
A.Seated,see clearly B.Having seated,make out
C.The students seated,make out D.Sitting,see clearly
D的区别
问题解答：
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