外国教授称“Ballpark”为：（）

We don't know exactly how many people live in this city, but a ______ figure would be about two million. A: ballpark B: estimated C: guessing D: possibly

When giving directions, you can ( ). A: use landmarks to tell the person what to watch for. B: use transitions. C: use fixed expressions to show a particular direction. D: offer “Ballpark Figures”