—You have no idea how to solve this math problem.—You should try to think about which principle can _______ it.
Be calm, Madam, can you remember _____you had your mobile phone stolen?
Look at the trouble I am in! If only I _____ your advice.
_________ that Tom got inside the room to see what was going on.
The hall of the school canone thousand people.
If you are able to talk to a friend over the telephone, you feel that you are close ____ the actual distance is not shortened.