You don’t know ________ I want to see you again. It’s years since I saw you last time.
My life _____ a lot in the last few years.
I don’t know _____ it next.
It's very difficult to learn English well, but you can't _____.
The sweater fits me well, but it is _______ expensive.
“Excuse me, could you tell me where the department store is?” sounds ______ than “Where is the department store?”