选出下列各组单词中画线部分读音与其他三个不同的一项。
( )(1) A. bag B. map C. grade D. can
( )(2) A. usually B. just C. under D. up
( )(3) A. sweater B. team C. bread D. head
( )(4) A. pear B. there C. where D. here
( )(5) A. collect B. cock C. o’clock D. Holiday