4. What do we learn about nano-spiders in the fifth paragraph? A They could protect our bodies from disease in the future.
B They are already being used to fight cancer,
they have been used for various medical purposes in the past.
D They have not actually been invented yet.
5What does the writer say about arguments against the use of nanotechnology?
A People are concerned that it is used to build computer parts.
B People are concerned that nano-products are not tested before they are sold
C There are concerns about whether the industry has strict rules for safety
D There are concerns about nanotechnology in medicine.​

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