“Their language is a chemical language，and it involves chemicals that move through the air that are easy to be changeable，and most of all are smells that we are familiar with，” Schultz explained.

　　“All plants responded to the attack by changing their chemistry to defend themselves，” Schultz recalled.“But we were quite surprised to find that nearby plants also changed their chemistry to defend themselves，even though they were not part of the experiment.”

　　Studies have also shown that plants under attack release pleasant chemicals.Those chemicals attract friendly insects that attack the pests eating the plant.

　　In the end，plants’ ability to communicate their needs—and our ability to understand them—could help farmers reduce the use of poisonous chemicals，cut operating costs and limit damage to the environment.

　　5．The recent scientific studies have shown that plants can________.

　　A．communicate with other living things in a chemical way

　　B．hardly react to any sudden change in temperature

　　C．use a very special chemical language which is familiar to us

　　D．respond to the attack by giving off poisonous chemicals

　　6．When being eaten by an insect，the plant will________.

　　A．walk away from trouble

　　B．change its chemistry to kill the insect

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