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studies existing tribes. studies ancient way of living. studies preindustrial societies. studies plants.
will have been had been should have been would have been
many children have been neglected． child maltreatment is most serious in developed countries． 20%of children have been sexually abused． 25—50%of girls have been physically abused．
had been taken place; have been set up have taken place; have been set up have been taken place; have been set up were taken place; were set up
imagination imaginary imaginable imaginative
have gone have been have gone to have been to
have has have been has been
was am had been have been
went; have gone have gone; have been have been; have gone went; have been
a great many of a great deal of ;a large amount of a great many
have set up has set up have been set up has been set up
Many production have been this way
three fourths, has three fourths, have thirds four, have third fours, has
will have been taken place will have taken place have been taking place have been taken place
was am had been have been
had been cancelled; which have been cancelled; what had been canceling; that have been canceling; where
have has have been has been
Three fourths; has Three fourths; have Third fours; has Thirds four; have
have been in have been to have gone to have been
have enjoyed enjoyed have been enjoying have been enjoyed
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