Researchers were surprised by the answer that the volunteers gave in the first test.

【T4】

A. ORDINARY

B. WERE BURIED

C. THEM A. WHERE PYRAMID BUILDERS【T1】______

B. WHO ACTUALLY BUILT【T2】______

C.【T3】______ EGYPTIANS BUILT THEM FOR CENTURIES, THE PYRAMIDS OF GIZA HAVE BEEN TIMELESS SYMBOLS OF EGYPTIAN CULTUR

E. BUT【T4】______？ FOR YEARS, WE DID NOT KNOW FOR SUR

E. BUT ARCHEOLOGISTS(考古学家)RECENTLY DISCOVERED AN ANCIENT VILLAGE NEAR THE PYRAMIDS. CLOSE BY, THERE WAS ALSO A CEMETERY【T5】______ FROM STUDYING THESE PLACES, ARCHEOLOGISTS CAN NOW CONFIRM THAT THE PYRAMIDS WERE NOT BUILT BY SLAVES OR FOREIGNERS【T6】______.

【T3】

A. ORDINARY

B. WERE BURIED

C. THEM A. WHERE PYRAMID BUILDERS【T1】______

B. WHO ACTUALLY BUILT【T2】______

C.【T3】______ EGYPTIANS BUILT THEM FOR CENTURIES, THE PYRAMIDS OF GIZA HAVE BEEN TIMELESS SYMBOLS OF EGYPTIAN CULTUR

E. BUT【T4】______？ FOR YEARS, WE DID NOT KNOW FOR SUR

E. BUT ARCHEOLOGISTS(考古学家)RECENTLY DISCOVERED AN ANCIENT VILLAGE NEAR THE PYRAMIDS. CLOSE BY, THERE WAS ALSO A CEMETERY【T5】______ FROM STUDYING THESE PLACES, ARCHEOLOGISTS CAN NOW CONFIRM THAT THE PYRAMIDS WERE NOT BUILT BY SLAVES OR FOREIGNERS【T6】______.

All of the following Were suggested as being used by sleep researchers EXCEPT ______.

A．electrodes

B．hypnosis

C．charts

D．recorders

【T5】

A. ORDINARY

B. WERE BURIED

C. THEM A. WHERE PYRAMID BUILDERS【T1】______

B. WHO ACTUALLY BUILT【T2】______

C.【T3】______ EGYPTIANS BUILT THEM FOR CENTURIES, THE PYRAMIDS OF GIZA HAVE BEEN TIMELESS SYMBOLS OF EGYPTIAN CULTUR

E. BUT【T4】______？ FOR YEARS, WE DID NOT KNOW FOR SUR

E. BUT ARCHEOLOGISTS(考古学家)RECENTLY DISCOVERED AN ANCIENT VILLAGE NEAR THE PYRAMIDS. CLOSE BY, THERE WAS ALSO A CEMETERY【T5】______ FROM STUDYING THESE PLACES, ARCHEOLOGISTS CAN NOW CONFIRM THAT THE PYRAMIDS WERE NOT BUILT BY SLAVES OR FOREIGNERS【T6】______.

How were the monkeys introduced to the idea of a cash economy？

A．They were told that metal discs could be traded for food.

B．They were given metal discs if they gave the researchers food.

C．They were shown the different values of three different kinds of food.

D．They were given some discs which researchers would exchange for food.

What did the researchers learn from the second step？

A．The trees in the new forest were in different size.

B．The insects in the new forest had a different taste.

C．Tamarins could get used to the new environment.

D．Above 80% of tamarins survived.

【T1】

A. ORDINARY

B. WERE BURIED

C. THEM A. WHERE PYRAMID BUILDERS【T1】______

B. WHO ACTUALLY BUILT【T2】______

C.【T3】______ EGYPTIANS BUILT THEM FOR CENTURIES, THE PYRAMIDS OF GIZA HAVE BEEN TIMELESS SYMBOLS OF EGYPTIAN CULTUR

E. BUT【T4】______？ FOR YEARS, WE DID NOT KNOW FOR SUR

E. BUT ARCHEOLOGISTS(考古学家)RECENTLY DISCOVERED AN ANCIENT VILLAGE NEAR THE PYRAMIDS. CLOSE BY, THERE WAS ALSO A CEMETERY【T5】______ FROM STUDYING THESE PLACES, ARCHEOLOGISTS CAN NOW CONFIRM THAT THE PYRAMIDS WERE NOT BUILT BY SLAVES OR FOREIGNERS【T6】______.