阅读下面短文，掌握其大意，然后根据短文内容和首字母的提示，在短文空白处填入适当的单词，使短文内容通顺、合理。
Do you know something about tree rings(年轮)? Do you know they can tell us what the w{#blank#}1{#/blank#}was like, sometimes even hundreds
of years ago?
A tree will grow well in a climate(气候) with lots of sunshine and rainfall. And little sunshine or
rainfall will limit(限制) the growth of climate by s{#blank#}2{#/blank#}the tree rings. For example, to
find out the weather of ten years ago, c{#blank#}3{#/blank#}the rings of a tree from the
outside to the i{#blank#}4{#/blank#}. If the
tenth ring is f{#blank#}5{#/blank#}from the
eleventh ring, then we're s{#blank#}6{#/blank#}that
it was sunny and rainy m{#blank#}7{#/blank#}of
that year. If it is near to the eleventh ring, then the climate that year was
bad.
Tree
rings are important not only for studying the history of weather but also for
studying the history of man. Many centuries ago there l{#blank#}8{#/blank#} a lot of people at a place in New Mexico. But
now you can find only sand there—no trees
and no people. What happened?
A scientist studied the rings of d{#blank#}9{#/blank#}trees there. He found that the people
had to leave because they had cut down all the trees t{#blank#}10{#/blank#} make fires and buildings. As all the trees had
gone, the people there had to move.
