Вместо пропусков вставьте глагол Will.

Who will change the ship's course? They will define the ship's position. We will solve many astronomical problems during our coming voyage. Will you work at the Engine Department? -No, I won't. He will be a very good radio-officer in two or three years. Will they help you to repair life-boats? We won't take bearings. Navigators will do it. Our Chief Engineer will be responsible for the reliable operation of the engine.