Decide about the correctness of the following items concerning singular and plur...

Questão de Inglês da banca CESPE CEBRASPE aplicada no concurso SGA DF (2004). Confira a resolução completa abaixo:

Decide about the correctness of the following items concerning singular and plural forms.

Most nouns ending in f or fe have plurals in ves, as in half/halves, knife/knives, leaf/leaves, life/lives.