There is some rubbish under the tree.We can't sit under the tree.（合并句子）
问题描述：
There is some rubbish under the tree.We can't sit under the tree.（合并句子）
答
There is so much rubbish under the tree that we can't sit under the tree.
答
There is some rubbish under the tree so we can't sit there
答
这里有一些兔子在树下面。我不能坐在树下面
答
There is some rubbish under the tree under which we can't sit.
答
Because there is some rubbish under the tree,we can't sit under the tree