单项选择题

What can weconclude from the last paragraph？

A. Travel advicesare not important.
B. Travel medicineis hard to be credible.
C. How to preventand treat disease can actually help travel medicine popularize.
D. People haven'trealized the importance of travel medicine.

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Potential subjectsshould be informed of the research and __________an opportunity to decide ifthey want to participate.

A. gave
B. giving
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单项选择题

Which of the followingis an entailment of the utterance "Annie trole the windo,e"__________

A. Annie was careless.
B. Annie was disruptive.
C. Annie did something tothe window.
D. It is Annie who brokethe window.