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. usuallyB. 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