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15. A. keep       B. send      C. lead      D. ask

名师点评

    文章以在陌生的城市找名胜为例,说明了解决数学最重要的是先找出一条通往答案的路径。

答案简析

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14. A. try your best               B. take your place

C. look up                 D walk on

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13. A. help       B. to help        C. helps      D help with

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12. A. need to have B. don’t need  C needn’t        D. in need of

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11. A. with       B. for       C. of        D to

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10. A. thought over               B. heard about

C. written down            D talked with

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9. A. of          B. to        C. in        D around

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8. A. not     B. no        C. some      D. much

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7. A. helps       B. gives      C. passes     D. shows

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6. A. if          B. though        C. whether    D. since

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