1. The head (cook) runs the hotel kitchen with strict discipline and efficiency.

2. The (chief) dangers in this life are the people who want to change everything, or nothing.

3. I think she’ll be (chief) of this company in three years' time, I’d stake my reputation on it. 

4. The (chief) problem is a lack of resources.

5. The (chief) element in the Earth’s crust is oxygen.

6. Highly talented, this outstanding (chef) has led the field in modernising traditional recipes into healthier dishes.

7. May I remind you, children, that I’m the (chief) of the family and I am in charge around here.

8. The (leader) is the representative of a village through whom the villagers as a body deal with the proprietor.

9. The doctor’s (chief) duty is to respect this right.

10.  The soldiers fired as soon as their (chief) gave the order.

11.  The (chief) suspect in a murder investigation.

12.  My (main) concern about moving to London is the cost of housing. 

13.  Iraq’s (chief) export is oil.

14.  Her health is (chief) in my mind.

15.  In professional kitchens, a (chef) is usually referred to as the executive or head chef. 

16.  Smoking is one of the (prime) causes of lung cancer.

17.  Mrs. Pankhurst was one of the (chief) protagonists of women’s rights.

18.  The (chief) pronounced that the technique was inadequate.

19.  The (chief) massed his warriors to attack the fort.

20.  The elephants are the (chief) attraction at the circus.