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Smith PROVIDES and ex_______ OF how genes influence obesity.
The authors GIVE a d________ OF how languages change over timw
Kun's su_______ that adults learn languages more slowly than children has been questioned by other researchers.
Uvarov's c_____ that computer games have negative effects on children has been recently put into question
Researchers are still searching for a DEFINITE pr_____ OF the link between smoking and cancer
One of the problems with Robertson's research is her em_______ ON the advantages of dictatorship
The im________ OF Jang's research is that motivation is crucial for language learning.
Hu's ar_______ that censorship is acceptable for security reasons seems convincing.