English and ESL Instructor
Each person must pay $25 before they could enter.
Craig has several pens. It is black.
In the first example, each person is third-person singular, so the correct pronoun should be he or she:
Each person must pay $25 before he or she could enter.
In the second example, several pens is third-person plural, so the correct pronoun should be they:
Craig has several pens. They are black.