there is a (c ) under the tree.let is go and sit on it

问题描述:

there is a (c ) under the tree.let is go and sit on it

这个是个病句哦,语法上有错误.不知道你的要求是什么.
是不是这样的啊:there is a (chair ) under the tree.let‘s go and sit on it.树下有个椅子,我们过去坐下吧.