1. Choose the alternative that contains only words that have the same spelling, both in their singular and plural forms:

A) People, crisis, emphasis
B) Sheep, species, moose
C) Oxen, fungi, diagnosis
D) Campus, bison, criteria

2. What’s the plural of the words “ox”, “person” and “fungus”?

A) Oxen, people, fungi
B) Oxs, persons, fungus
C) Ox, people, fungi
D) Oxen, persons, fungus

3. Some words lose a letter when one adds a suffix to them, like in “true-truly”.

Which alternative contains a word that behaves in a similar way?

A) She’s a big disappointment to her parents.
B) It’s unbelievable how far people will go to gain some power.
C) You have to be careful, walking these streets so late at night.
D) The lecture was an endless sequence of boring facts and unintelligent remarks.