There is ____ Mr. Smith at the door who wants to speak to you.
【2015·北京】_____the damage is done, it will take many years for the farmland to recover.
【2015·北京】You won’t find paper cutting difficult _____you keep practicing it.
【2015·北京】He is a shy man,___he is not afraid of anything or anyone.
【2015·湖南】Video games can be a poor influence if ________ in the wrong hands.
【2015·安徽】Some experts think reading is the fundamental skill upon______school education depends.