4. Young children are unable to grasp _____ ideas before they reach a certain level of cognitive maturity.
(A) lucent
(B)abstract
(C) profane
(D) tangible
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統計: A(11), B(230), C(16), D(59), E(0) #1990718
統計: A(11), B(230), C(16), D(59), E(0) #1990718