It is the ability to do the job ____matters not where you come from or what are. 

It is these poisonous products____ can cause the symptoms of the flu, such as headache and aching muscles.

–Madam, the two ties are the new arrival of this season.–Well , I like ______ of them. Do you have another one?

Even if they are on sale, these refrigerators are equal in price to, if not more expensive than, _____ at the other store.

This is the most important assignment facing American journalism — to make _____ clear to the reader the problems of the day.