23. In paragraph two, the word frivolous is closest in meaning to _____.
(A) silly or light-hearted
(B) informal
(C) depressed
(D) happy and noisy
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統計: A(132), B(181), C(72), D(125), E(0) #2906363
統計: A(132), B(181), C(72), D(125), E(0) #2906363