Suppose(假设) you are going to Boston, and you 1 the city
before. If someone 2 （有点儿） like trying to find your way 9 a new city. Perhaps the words may tell you some information and you have 10 it, but you can’t see any clear road 11 the answers. you about the interesting places in the city, you __3 to get some ideas of what you will see. But don’t have a 4__ idea of where these places are or of how to find 5 . However, 6__ someone has a map of the city and 7 you the main roads and buildings, you may say, “ Oh, now I see . I can find my way with 8__ trouble at all ”. Working in math is somewhat
