12. Children are the major _____ in every classroom. They ensure nothing is ever the
same and mean that a great lesson with one class may be an abject failure with
another.
(A) foundation
(B) element
(C) characteristic
(D) variable
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統計: A(7), B(16), C(7), D(30), E(0) #2734880
統計: A(7), B(16), C(7), D(30), E(0) #2734880