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In 199639 American students started a very interesting project-the Green Tree project

The students began the project by collecting walnuts(核桃)in autumnThen the nuts were put under the ground of the school garden in NovemberIn this waythe seeds(種子) could be kept cool and wet for several months before they started growing

In Februarythe seeds were dug up(挖出)so that they could begin to sprout(發(fā)芽).Sprouted seeds were kept in refrigerators so that they could be stopped from growing until the time to plantThis helped keep the trees about the same size at planting time

In Marchsprouted seeds were planted in paper cupsEach student was asked to plant twelve treesThen the trees were carefully watered and watchedThe first walnut trees began to appear in about a weekThe students found this part of the project very exciting

On April 29ththe trees were moved and planted by a lakeIt took the students only 90 minutes to plant all the treesIt was so interesting to see a treeless area turn into a forest right before their eyes!

1How did the students begin their Green Tree Project?

2Why were the nuts put under the ground for several months?

3When did the seeds begin to sprout?

1、1By collecting walnutsin autumn).

2Because the nuts were kept cool and wet

3In February

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In 1996,39 American students started a very interesting project-the Green Tree project.

The students began the project by collecting walnuts(核桃)in autumn.Then the nuts were put under the ground of the school garden in November.In this way,the seeds(種子) could be kept cool and wet for several months before they started growing

In February,the seeds were dug up(挖出)so that they could begin to sprout(發(fā)芽).Sprouted seeds were kept in refrigerators so that they could be stopped from growing until the time to plant.This helped keep the trees about the same size at planting time.

In March,sprouted seeds were planted in paper cups.Each student was asked to plant twelve trees.Then the trees were carefully watered and watched.The first walnut trees began to appear in about a week.The students found this part of the project very exciting.

On April 29th,the trees were moved and planted by a lake.It took the students only 90 minutes to plant all the trees.It was so interesting to see a treeless area turn into a forest right before their eyes!

1.How did the students begin their Green Tree Project?

2.Why were the nuts put under the ground for several months?

3.When did the seeds begin to sprout?

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