According to the researchers, what should doctors do to treat diseases like HIV？
A. Develope new drugs to avoid resistance.
B. Stop using drugs when the patient"s condition allows.
C. Use different drugs in turn during the treatment.
D. Change the combination of drugs from time to time.
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According to the interviewee, how do bacteria develop resistance？
A. Some bacteria are so strong that drugs can"t get into the cells.
B. Some bacteria are able to drive the drugs out of their cells.
C. Some bacteria are able to hide behind other ones.
D. Some bacteria can reproduce before they are killed by drugs.
What happened the day after researchers put two antibiotics in the test tube containing E.coli？
A. The two antibiotics began to work against each other.
B. Most of the E.coli were killed by the antibiotics.
C. E.coli showed a kind of resistance towards the drugs.
D. The population of E.coli began to grow dramatically.
What is the finding introduced by the interviewee？
A. Drugs seem to be able to target bacteria accurately.
B. Certain drug combinations work well against HIV.
C. Taking two drugs at the same time shouldn"t be encouraged.
D. Some bacteria are more resistant to drugs than others.
The function of the sentence "I apologize" is
A. interrogative.
B. directive.
C. informative.
D. performative.
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