there are some pencils ondesk改为单数句
There is a pencil on desk. 桌子上有一支笔
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第1个回答 2017-09-28
单数: There is a pencil on desk.
第2个回答 2017-09-28
There is a pencil on desk.
第3个回答 2017-09-28
there is a pencil on the desk