------Mum,can I go out to play with Tom for just a while ? ------ _______ and do what you like.
I’m Mr. Brown from the police station. Could you tell me _____the butcher found moving slowly across the square?
. ---I am green at everything. ---Don’t worry. _____ you get older, you get more experience. A .When B. Till C. As D While
The men will have to wait all day _____ the doctor works faster..
I often have conversations with John over _____telephone, while I keep in touch with Tom by _____letter.
. ---Would you mind my sitting on the seat beside you, sir? ---______.