When all those May flowers start to show their heads out to say hello，you may see some familiar faces in your backyard.Many plants live and die within one growing season，so gardeners must replant them each spring.But others have developed to live year after year，so they can blossom again.
Many flowers are what we call annuals.Their entire life cycle-form seed to death-takes just one year.They might leave behind sleeping seeds，but the roots and leaves all fade away as-soon as the season is done.Then there are perennials，which can survive for years.Scientists believe these types of plants came first.They do no need to be replanted each season，but save some energy in themselves so that they can show again in the following season.
James Boyer，the vice president for children's education at the New York Botanical Garden，says that annuals probably can survive in areas where there is little water."Annuals are putting all of their chances into the reproduction basket，"Boyer explains."All of the energy to make roots and shoots is just enough to create a big bloom.They will create enough seeds to continue the species.Perennials hide important parts inside protective buds to keep cells fresh until it's time to bloom again.They devote a lot more of their fuel to keeping themselves alive than annuals do.Roots and leaves are repaired and regrow each year.Many eventually produce flowers，but it can sometimes take years.And in most cases，they'll save enough energy to flower again in the following season."
Whether a plant is a perennial or an annual can depend on where you plant it.Plants sold in cold areas that are named as annuals actually could be perennials in hot areas；in warm weather they can live for years，but a single cold winter will wrack them.
Boyer says that researchers are trying to study them."If we could change com into a perennial，we wouldn't need to replant it every year，which destroys the soil and its ecosystem，"Boyer says."It could change our agricultural system."
（1）How can perennials survive into the following season？ BB
A．By producing sleeping seeds.
B．By setting aside some energy.
C．By adapting to climate change.
D．By preserving their roots and leave.
（2）Which of the following may James Boyer agree with？ CC
A．Their findings are out of expectation.
B．It is easy for perennials to survive with little water.
C．Annuals spend most energy in blossoming and reproducing.
D．Both annuals and perennials prefer warmer growing conditions.
（3）What does the underlined word"wrack"in Paragraph 4 mean？ DD
A．Protect
B．Keep.
C．Change.
D．Destroy.
（4）How does the text mainly develop？ DD
A．By giving explanation.
B．By offering examples.
C．By drawing conclusions.
D．By making comparisons.
【答案】B；C；D；D
【解答】
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發(fā)布：2024/5/27 14:0:0組卷：1引用：1難度：0.5
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A．The new rule treats them as American citizens.
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（4）What does the underlined phrase "in limbo" in the last paragraph mean？
A．Horrible.
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D．Unbelievable.發(fā)布：2025/1/6 15:30:8組卷：0引用：1難度：0.5 -
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（2）What does the underlined word "ecocide" in paragraph 2 mean？
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（4）What's the author's opinion on protecting the hotspots？
A．It's simple to carry out.
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D．It suggests that the local people are well educated.發(fā)布：2025/1/6 16:30:6組卷：0引用：1難度：0.5 -
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A．jogging on the street
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D．sitting in the garden
（2）From the second paragraph，we can see that.
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D．A garden nearby improves the quality of old people's life.
（4）what is the main idea of this passage？
A．Access to nature improves our life.
B．Nature treats children for ADHD.
C．Getting close to nature reduces crime.
D．Man can't live without natural areas.發(fā)布：2025/1/6 16:30:6組卷：0引用：1難度：0.5
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