问题标题：
【Theteacheriswriting____apieceofchalkontheblackboardwhilethestudentsarewriting____inkinexercisebooks.Awith,inBinwithCin,inDwith,with】
问题描述：
Theteacheriswriting____apieceofchalkontheblackboardwhilethestudentsarewriting____
inkinexercisebooks.
Awith,in
Binwith
Cin,in
Dwith,with
高颖回答：
Awith,in
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