一Bob，shall we go and meet our new classmate?

一Sorry．I'm busy now．But you_________ ask David to go with you．He is free．

A．need　 B．may　 C．would　 D．must

---Shall we stop and have ________ tea now?

---Great.

1. A.
   any
2. B.
   some
3. C.
   little
4. D.
   a bit

 We have______ running for two hours. When shall we stop, sir?

　　     A. been practising        B. practise        C. Practised       D. practising