Page 80 - 五点英语

五点英语

二、完形填空
There is nothing 13 than a walk in the countryside for lifting our spirits. Connecting with nature can help

our mental health. For some people, it feels great to take a walk through a forest, 14 as we admire the trees
around us, it’s worth 15 these trees are doing more than just being nice things to look at.

We have already noticed that trees play an important role in taking care of our world. They produce oxygen
and clean the air we breathe by 16 about a quarter of all human caused carbon dioxide emission.

But there is more to these trees than we might think. Researchers 17 that they are actually very smart.
It’s thought that trees use a fungal network to talk and share resources right 18 our feet. Under the ground

are tree roots, bacteria and super fine threads of fungi. And research has shown that they are all mixed together.
They can help each other by sharing “food”, and they can even tell 19 some coming dangers. Scientists say it is

like the trees are talking to one another.
Ecologist Li Wenhua has called this network the Wood Wide Web. She discovered that parent trees use this

network 20 their children. She also found that trees are smart enough to change their behaviour to live in a
changing environment.

So it seems trees 21 are the stars of our natural world, and with around three trillion of them on our 22 ,
it’s time to show them some respect if we want them to grow better.

( )13. A. good B. well C. better D. best
( )14. A. and B. but C. or D. too

( )15. A. knowing B. to know C. has known D. know
( )16. A. taking on B. taking out C. taking off D. taking in

( )17. A. have discovered B. discovered C. discover D. are discovered
( )18. A. under B. on C. in D. after

( )19. A. us B. them C. our D. their
( )20. A. help B. helps C. to help D. will help

( )21. A. finally B. final C. real D. really
( )22. A. planet B. plane C. plant D. plan

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