Complete the sentence with the correct form of the verb in brackets: My shift at the wheel lasts from 2 p.m. until 7 p.m. tomorrow, so at 4 p.m. I ___ (drive) across the plain.

Explication

Four o'clock falls inside the speaker's own five-hour driving shift, so the action will be in progress at that exact future moment. A simple will form can announce a future act, but it does not express the stipulated view of the speaker already being midway through the shift.