专四专八考试

【单选题】Questions 11 to 14 are based on the following passage.At the end of the passage, you will be given 20 seconds to answer the questions.
Now, listen to the passage.
The ultimate purpose of the research is to ______.A．have a better understanding of the life of mosquitoes
B．prevent human beings from being bitten by mosquitoes
C．purify the environment
D．keep people healthy

网考网参考答案：B
网考网解析：
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