-Can I help you ?
-__________
A.Yes ,I want to buy a book.B.Here they are.C.Thank you .
__________ are you going ?
-This afternoon.
A. When B. Which C. Where
- __________ can I get to the zoo ?
-On foot .
A.HowB.WhenC.Where
Read and choose（读一读，找出每组单词中不同类的一个）
The children are practising____.
A.listen B.listens C.listening