找出划线部分读音与其余三个不同的选项。
( )1. A. bread B. head C. mean D. sweater
( )2. A. sorry B. dog C. no D. box
( )3. A. look B. book C. food D. foot
( )4. A. quickly B. sign C. pick D. litter
( )5. A. public B. suddenly C. must D. put
( )6. A. cake B. make C. cage D. grass