第1个回答 2012-09-21
若就under the tree 提问
Where are they?
若就they 提问
Who is under the tree ?
第2个回答 2012-10-30
若对they提问,则是who are under the tree?
对under the tree提问,则是where are they?
第3个回答 2012-09-21
若对they提问,则是who is under the tree?
对under the tree提问,则是where are they?
第4个回答 2012-09-21
are they under the tree?