Bangladesh's floating gardens，built to grow food during flood seasons，could offer a continuous solution for parts of the world which are likely to suffer from flooding because of climate change，a new study has found.
   Bangladesh's floating gardens began hundreds of years ago.The gardens are made from native plants that float in the rivers and operate almost like rafts （筏），rising and filling with the waters.Historically，they were used to continue growing food during rainy seasons when rivers were filled with water.
   The farmers layer the plants about three feet deep，creating a version of raised-bed gardens that float in the water.Then，they plant vegetables inside those rafts.As the raft-plants rot away，they release nutrients，which help feed the vegetable plants.
   But as climate change affected the volume of water in those rivers，the researchers wanted to understand whether Bangladesh's floating gardens could be a continuous farming practice.They interviewed farming families and found strong evidence that floating gardens provide stability，both in the amount of food available to feed rural populations and in a farming family's income.
   They found that farmers typically use hybrid（雜交） seeds，which must be repurchased each year，to grow a diverse range of vegetables in the floating gardens.The gardens are also sensitive to pests，so farmers end up spending some money on both pesticides and fertilizers.But even with those expenses，they found，benefits outweighed costs.One farmer told the research team that he earns up to four times as much money from the gardens as from traditional rice fields.
   However，before gaining profits，farmers often take out high-interest loans（貸款）to cover the investment costs of filling the beds and stocking them with plants.Luckily；there are also lower-interest loans from responsible government or non-governmental organizations，which could ease that burden.

（1）How do vegetable plants grow according to the text？

A

A

A．By absorbing nutrition from raft-plants.
B．By taking shelter from climate change.
C．By living together with hybrid seeds.
D．By moving up and down with raised beds.
（2）What might be a reply from farming families interviewed？

D

D

A． "Our life becomes tough when rivers flood."
B． "Fewer vegetables are planted when water rises."
C． "We harvest much more food during rainy seasons."
D． "Climate change has little influence on our income."
（3）What does the underlined word "outweighed" in paragraph 5 mean？

C

C

A．Affected.
B．Brought.
C．Beat.
D．Equaled.
（4）What can be inferred from the text？

D

D

A．A solution to climate problem has been found.
B．The gardens are built with rotted native plants.
C．Farmers earn more from traditional rice fields.
D．Low-interest loans lighten the stress of farmers.