(2013·河南豫西五校高三质检)Misunderstandings ________ from lack of social communication, unless ________ properly, may lead to serious problems.

Shanghai authorities have guaranteed the quality of the city’s drinking water _____ more than 7500 rotting pigs ______ floating on the Huangpu River in the past week.

Around 15,000 officials gathered in Copenhagen, trying to map out an effective strategy _____ the battle against climate change．

.The little girl was____________by a____________noise at midnight.

    hardly made Allen pay any attention to correcting his mistakes.