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TOEFL
/
Listening practice
/ Section 6ZS5
Listen to an Academic Talk
Listen to part of a talk in a microbiology class.
Listen
47. What can be inferred about a species that has never been exposed to a drug?
A
It cannot become resistant to that drug.
B
It will be more strongly affected by the drug.
C
It may acquire resistance from another species.
D
It will lose resistance genes over time.