2. A. look
3. A. put
4. A. apple
5. A. your
B. foot
B. but
B. stamp
B. four
C. food
C. mum
C. at
C. our
_______________
1. C 2. B 3. B 4. A 5. B
判断下列单词画线部分有几种读音.把对应选项的相关攻略