I asked the boss for a month’s holiday and, _____ it or not, he agreed.
No conclusion _________ about the new product until the result of the experiment has been announced.
Don't you think it a pity that John ______ have behaved roughly toward us?
The well-known director, two of________ films won Oscar awards, is said to have retired.
Whether you believe it or not, it was________ caused the serious accident.
We paid ________ cash in the hope that we can get a 15% _________.