-- May I speak to your manager Mr. Williams at five o’clock tonight?--I’m sorry. Mr. Williams _______ to a conference long before then.”
-When ______ and visit our exhibition next month ? -When _______ , I will let you know .
---How long _______ each other before they ________ married ? -- -For about a year .
I really wonder ______ he has posted me many parcels _____ we worked together .