. The millions of calculations involved, had they been done by hand, _____ all practical value by the time they were finished.
—— I will come to attend your lecture at 10:00 tomorrow. —— I’m sorry, by then my lecture will have ended and I___my guests in my office.
I don’t like the way _____ you talk to your mother.
We will have a meeting next week, but we don’t know _____.
Be sure to be here early tomorrow, _____?
It’s a fine day. Let’s go swimming, _____?