---- Mummy, can I go out for a play for a while? ---- Yes, if you _______. But make sure you e back before 8:00.
The pupils were playing games in the classroom ________ a gunman entered and began shooting wildly at them.
Actually, the London Olympic Park is built ________ there used to be a poor area called East London.
You had better book rooms at the hotel in advance ________ you should find no room on your arrival.
________ you are unable to deal with it, perhaps we should ask someone else for help.
You seem to have a readymade answer ________ I ask you a question.