选出划线部分读音与其他三个发音不同的选项。
( )(1) A. whom B. who C. whose D. wrong
( )(2) A. spell B. dress C. secret D. desk
( )(3) A. birds B. flowers C. maps D. boys
( )(4) A. come B. brother C. mother D. go
( )(5) A. think B. father C. those D. that