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1 .Why did the chimpanzees walk on two limbs during Kyoto University’s experiment?
A Because they imitated the human way of walking just for fun. B Because they wanted to please the researchers to get more coula nuts from them. C Because they wanted to get to the nut-rich forest faster by walking that way. D Because they wanted to carry more nut with two free limbs．
2 .What call we infer from the reading passage?
A Chimpanzees are in the same process of evolution as our ancestors were． B Chimpanzees are similar to humans in many behaviors. C Walking oil two limbs and walking on four limbs each have their advantages. D Human walking on two legs developed as a means of survival．
3 .1
A unless B when C if D until
4 .2
A electricity B magnetism C ultraviolet D radioactivity
5 .3
A dynamics B geology C economics D biology
7 .5
A decision B solution C suggestion D qualification
8 .6
A roughly B probably C commonly D specially
9 .7
A retrieve B merge C exchange D require
10 .8
A vulnerable B necessary C important D renewable
