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问答题
CAN ANIMALS BE MADE TO WORK FOR US? Can animals be made to work for us? Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings. The
A.22.
B.23.
C.24.
D.25.
E.26.
F.27.
G.28.
H.29.
I.30.
J.
B.23.
C.24.
D.25.
E.26.
F.27.
G.28.
H.29.
I.30.
J.
