The public transport system in Beijing is very good now, so there _____be any difficulty in traveling around the city.
----It's too late now. I think it's time for me to leave. ---- ____.
Is this school ____ you studied at ten years ago?
What the boy ____ make his friends happy.
He was so pleased with all ______ we had done for him _____ he wrote us a letter to praise us for it.
---- Who were those people with the flag? ---- A group _______ itself the league for peace.