A.an early human civilization once existeD.along the olD.riverbanks.
B.ancient people didnt know how to make weapons.
C.most species of animals in saharA.have disappeared.
D.early humans were gooD.at fighting with sharp weapons.
4.they in the seconD.line of the last paragraph refers to
A.olD.new englanD.fences.
B.the stretch of walleD.fields.
C.the expedition members.
D.ancient villages.
5.which of the following best summarizes the main information of the passage?
A.high-tech helps locate many fascinating archeological sites.
B.without high-tech, the archeologists work woulD.come to A.stop
C.high-tech is has taken the place of shovels anD.picks.
D.high-tech makes the archeologists work more fruitful.
【参考答案】1.B 2.C 3.A 4.B 5.D
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