Choose the correct answer

Câu 17: The speaker likes to have an attentive audience.
 
A. neglecting B. positive C. active D. interested
 
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Câu 18: Some couples see single women as a threat to their relationships.
 
A. married B. lonely C. divorced D. alone
 
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Câu 19: Fish only species that are not of concern, threatened or endangered.
 
A. bettered B. born C. safeguarded D. taught
 
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Câu 20: The business was acquired from Orion four years ago.
 
A. before B. later C. ahead D. last