Please help me on this!

Used primarily for thickening sauces and soups, a (paste/roux/stock) is made from a (1: 2/2: 1/1: 1) fat and flour.

Knowing if a patient has tuberculosis, hepatitis b, or aids is important because a. serious illnesses should be avoided. b. they could compromise the vital sign readings. c. cross-infection may occur. d. they can't be cured.

There is only one copy machine at your office. you have to make 1000 copies of an expense report. after you begin copying, two other employees show up in the copy room. each has to make only 10 copies each. what is the proper etiquette in this situation?