ne knows that _____ is dangerous to play with fire, but _____ is difficult is to prevent children from playing with fire.

Like most of my schoolmates, I have neither brothers nor sisters – ______, I’m an only child [ ]

em society, some young people spend____ muchmoney they make

John opened the door. There _______ he had never seen before.

I listened to a report about the Diaoyu Island Dispute last weekend and that was the first time Iabout the subject