50 I wonder __________.
(A) whose book this is
(B) whose book is this
(C) whose is this book
(D) whose this book is

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統計： A(12), B(6), C(0), D(5), E(0) #2280347

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#5310882
44.50 我想知道（A）這是誰的書（B...
(共 44 字，隱藏中）
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