28 Joe ........ to finish his homework before he goes to the cinema with his friends.

Определим тип задания: выбор модального глагола.
Joe has to finish his homework before he goes to the cinema with his friends. — Джо должен закончить свою домашнюю работу, прежде чем пойти в кино со своими друзьями.
Ответ: B