I.                    下列各组单词中划线部分有几种发音

一种A                  两种B           三种C           四种D

（d　）1. during                 sure               nurse              turn

（a　）2. uncle                   thank             drink              think

（b　）3. forgetful                     foreign          motorcycle     world

（a　）4. heard                   wear                     dear               near

（a　）5. classroom            cook             football          took

（b　）6. famous                enough           outside           would

（b　）7. worked                danced           cleaned           wanted

（d　）8. always                 animal            walk                     also

（a　）9. experience           exciting          excuse            exam

（a　）10.performance        special            discover         certainly

第1,3,4，6,7,8,9,10题