Most of _______ads don’t tell you anything real.
It’s going to rain.You should take umbrella.
----Do you know ________ man who is standing under the tree? ----He is my new English teacher, Mr Hu.
…Is this book you were talking about yesterday? …Yes，thank you very much.
It is _______ unusual thing for us to find ________ UFO.
There is ________ elephant in the picture.
