Is it the book that ________ people of all ages ______ became the best-seller last year?A.attracted to, thatB.appeal to, thatC.attracted, whichD.appealed to, that
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B解析考查语法，it is ..that...强调句型，that appeal to people of all ages 是被强调部分，that became the ...是定语从句修饰the book。故选B.