1. Special variables that hold copies of function arguments are called _______ .2. When only a copy of an argument is passed to a function, it is said to be passed by _______ .3. A(n) _______...

1. Special variables that hold copies of function arguments are called _______ .2. When only a copy of an argument is passed to a function, it is said to be passed by _______ .3. A(n) _______ eliminates the need to place a function definition before all calls to the function.4. A(n) _______ varia...