It's "EMPLOYEES ONLY," Not "EMPLOYEE'S ONLY!" Test Your Knowledge of the Apostrophe

"Using the apostrophe 1."

Think you know how to use the apostrophe? Take this test. (Numbers 9 and 10 are, given the grammar of English, ambiguous, so here's a hint: There's only one cat, and many Romans.)

Links to more about using the apostrophe of possession, a list of other grammar exercises, and another exercise using the apostrophe are at the bottom.