28. This textbook is written in a style______ to teenagers. In other words, it is not too difficult for them.
(A)beautiful
(B)appropriate
(C)bankrupt
(D)courageous
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統計: A(4), B(132), C(7), D(37), E(0) #1496760
統計: A(4), B(132), C(7), D(37), E(0) #1496760