单项选择题

Almost everyone in the world uses oil in some way. Without oil, the world will stop, so men look for it everywhere. They drill for oil in the deserts, in mountains and under the sea. Quite often they find nothing, but the search for oil always goes on. Oil is very important because none of our machines can run without it. Big ships carry oil everywhere. Perhaps the oil in your bicycle or in your father’s car has come from somewhere far away. Perhaps it has come from Iraq (伊拉克) or Venezuela (委内瑞拉). Cars and bicycles need oil, and so do many other things. How many things can you name
In the passage the world "drill" means ______.