单项选择题
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 alert
单项选择题 The custom of writing on Easter eggs comes from ().
单项选择题 All the following statements are true about the refugees EXCEPT that
单项选择题 Under the influence of alcohol, people will ().
