Teenagers ______ social experience, so they are easily ______ when they first step into society.
Her daughter was admitted into college______ we had hoped.
_____his father had come, his face lit up.
______, they would certainly come and help us.
-How long ______ each other before they ______ married? --For about a year.
Smith ______ a book about China last year, but I don't know whether he has finished it.