Gun control is a subject ________ Americans have argued for a long time.
We need a chairman _____.
_____ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
In some countries, _____ is called “equality” doesn’t really mean equal rights for all people.
The mere fact _____ most people believe nuclear war would be madness doesn’t mean that it will not occur.
I don’t doubt _____ he is a brilliant scientist, but can he teach?