阅读短文，根据短文内容，从方框中选择恰当的单词并用其适当形式填空，使短文意思完整、通顺。

    You have visited Boston before. Your friends have to the city. They say there are many interesting places in Boston. Some of them you about these interesting places in it. So you begin to know something Boston, but you don't know where these are or you don't know how to find . However, someone gives you a map of this city and shows you the main roads and buildings, you may say excitedly, "Oh, now I see. I can find many places with trouble at all."

    Maps are useful and could help you find your way in a city if you have never been to this city. When you want to go to a new place, you'd take a map with you.