粉笔被用于在黑板上写字.Chalk_____ _____ _____ ____on the blackboard.
问题描述:
粉笔被用于在黑板上写字.
Chalk_____ _____ _____ ____on the blackboard.
答
粉笔被用于在黑板上写字.
Chalk_____ _____ _____ ____on the blackboard.