Through the group discussion between ______ , we figured out the differences between adolescence and adulthood.

What is the difference between experimental group and control group? A: Treatment B: Effect C: Sampling error D: Observation time E: Location

Through the group discussion between _______, we had a better knowledge of the origin and evolution of languages.

The difference between the control group and the experimental group was （） A: the training that parents received B: the age of the children C: the books that were read D: the number of the children

The Celts became the dominant group in Britain between the 8 th and 5 th centuries BC.

Through the group discussion between ______ , we figured out the differences between adolescence and adulthood. A: Abbas, Zuowan and Jialin B: Billy, Xuanhui and Jialin C: Abbas, Xuanhui and Jialin D: Billy, Xuanhui and Zixiao

Much ________ the success of the collaboration between the Group of Seven governments and Brazil. A: hangs about B: hangs out C: hangs on D: hangs up

The Great Lakes on the border between Canada and the U. S. are the largest group of freshwater lakes in . A: the continent of America. B: the world C: North America D: South America

The biggest difference between Observational studies and Experimental<br/>research is( ) A: Intervention or treatment B: Prospective C: Random allocation D: Paralleled control group E: Blinding

Which age group below is the least polite in the tests? A: people before 40 B: people in 20s C: people between 40-50 D: people over 60