By the time you have finished this book, your meal ______ cold.
Never _______ forget the days when _______ together with you.
The two old sisters,_______ so long,held each other and burst into tears.
— When will you leave for Paris for a visit?—_____next month.
In such dry weather the flowers will have to be watered if they _____.
It's impossible for all the people to get jobs because ____of them are not fit for them.