They have to do a lot of work, ________ they?
--- Do you have a new watch? --- No, I _________ .
---Where _____my books? --- _____ on the bed.
--- Look at these girls. Are ________ your friends? --- No, I don’t know _________.
My friends and I play_______ soccer in the afternoon.
下列一组单词中,划线部分发音不同于其它三个的单词是_______。