It was unwise of him to ______ the unreliable data in his speech.
You needn't have apologized for your absence—________, it's hardly your fault.
Once you are ________ to smoking, it is difficult to give it up.
There is no doubt that I'm trying to do what is best, but ________ I have got to consider the cost.
If the price of oil remains ________ for the rest of 2013, I will consider buying a new car.
Mike did the homework ________ it took me.