In 1996， 39 American children started a very interesting project—the Green Tree Project. The students began the project  1  gathering walnuts (核桃) in the autumn. The nuts were buried in cages in the school garden in  2  mid-November. In this  3 , the seeds could keep cool and moist (潮湿) for  4  months before they started growing. In February, the seeds (种子) were dug up, and they began to sprout (发芽). Sprouted seeds  5  in fridges  6  they could be stopped from growing  7  it was time to plant them. This  8  keep the trees about the  9  size at planting time. In March, sprouted seeds were planted in  10  cups. Each student was asked to plant trees. Then the trees were  11  watered and watched. The walnut trees began to  12  in about a week. The students found this part of the project very  13 . On April 29, the trees were transplanted to the lake. It  14  them only 90 minutes to plant all the trees. It was so interesting to see a treeless area  15    into a forest right before their eyes!

(  ) 1. A. for         B. by       C. with       D. of

(  ) 2. A. a           B. an      C. the         D. /

(  ) 3. A. way       B. idea     C. thought    D. road

(  ) 4. A. a little     B. plenty C. a lot  D. several

(  ) 5. A. kept                      B. were kept

C. were keeping         D. are kept

(  ) 6. A. because                    B. so that

C. since                D. in order to

(  ) 7. A. until       B. since       C. during       D. towards

(  ) 8. A. caused    B. helped C. made D. supported

(  ) 9. A. different               B. necessary

C. proper           D. comfortable

(  )10. A. soft paper drink    B. paper drink soft

C. drink paper soft     D. paper soft drink

(  )11. A. careful                 B. careless

C. carefully               D. cares

(  )12. A. appear                 B. disappear

C. come up           D. come true

(  )13. A. excites                B. excited

C. exciting            D. more exciting

(  )14. A. paid       B. spent  C. cost        D. took

(  )15. A. become  B. turn    C. to get      D. to change

参考答案： 1~5   BDADB    6~10  BABCA    11~15 CACDB

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