What’s wrong with him? I haven’t seen him _____ last Wednesday.A. on B. since C. by
-----Is she Helen? -----__________. She is Gina.
-----Tony, ________ is my good friend, Harry. ----- Hello, Harry.
-----Are those your pencils? -----_________.
They ______ my brothers, and she ________ my cousin.
It is ___________pen.