Question

Trees in the Amazon rainforest are showing scientists the past in order to help them predict the future.

Have you heard about tree rings ? Some trees create rings every year ________they grow. These rings can be ______in the tree trunks when the trees are cut down .Counting tree ______can tell us how old the tree is , but UK scientists have ________a way of learning about the climate of the rainforest in the past from the tree rings .

Growing in the Amazon rainforest, some trees only have short roots. This means that the trees depend on rain water, _______ the water that naturally occurs deeper underground . Therefore, the rings of tree trunks(树干) can _______the rainfall in the forest in the past.

The rings can help us understand the rainfall, _______the climate of the Amazon forest over the last 100 years .What scientist want to know, however, is how the rainforest will be affected by the world’s rising temperatures. Will it _______wetter or drier? The Amazon rainforest is known as the “lung（肺） of the earth ” for the amount of CO2 _______the trees take in from the air every day. A warming world could have a very bad effect on this important forest, but with more information about the ______ , scientists hope to know what one of the most important rainforests in the world will be like in the future .

1.A. as B. since C. although D. after

2.A. heard B. drawn C. produced D. seen

3.A. rings B. leaves C. fruits D. roots

4.A. changed B. forgotten C. discovered D. imagined

5.A. rather than B. as for C. because of D. thanks to

6.A. influence B. cause C. increase D. show

7.A. yet B. ever C. even D. still

8.A. taste B. smell C. sound D. become

9.A. when B. that C. where D. why

10.A. humans B. animals C. past D. future

1.A 2.D 3.A 4.C 5.A 6.D 7.C 8.D 9.B 10.C 【解析】本文讲的是亚马逊雨林中的树木的年轮可能会揭露雨林过去的气候状况，科学家想借此预测未来的雨林变化。 1.句意：许多树木当它们生长的时候每年都产生年轮。A.当…B.自从C.虽然D.在…之后，as引导时间状语从句表示“当…时”，长年轮和生长是同时发生...

Answer 1