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Suppose(假设) you are going to Boston, and you 1 the city
before. If someone 2 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（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.
Maybe you 12 a kind of map of the main roads in maths 13__ you find your way. Explore（探究）what lies in maths, and 14 to find
the main roads. They will 15 you to the answer. If you can find the “map”, the maths problems will be easily worked out.
1. A. are going to visit B. once visited C. have never visited D. have ever visit
2. A. answers B. shows C. meets D. tells
3. A. begin B. like C. learn D. refuse
4. A. clever B. clear C. strange D. wrong
5. A. someone B. Boston C. them D. it
6. A. if B. though C. whether D. since
7. A. helps B. gives C. passes D. shows
8. A. not B. no C. some D. much
9. A. of B. to C. in D around
10. A. thought over B. heard about C. written down D talked with
11. A. with B. for C. of D to
12. A. need to have B. don’t need C needn’t D. in need of
13. A. help B. to help C. helps D help with
14. A. try your best B. take your place C. look up D walk on
15. A. keep B. send C. lead D. ask
v. 拒绝
n. 垃圾，废物
