do great harm to 中,great 前难道能加 a

题目

do great harm to 中,great 前难道能加 a
短文改错
I’d like to tell you something more(去掉more )about the problem of pollution we are facing.
As we know,the factory besides (beside) our school gives off heavy smoke all day long.Very loudly(loud) noises
hurt our ears.Rubbish and waste is (are) thrown here or (and) there.They also send out polluting (polluted) water and poisonous gas.All this has made (done) a great harm to the health and study of the teachers and
students.But as time goes on,few (little) has (加been)done to improve the situation.I don’t think we could (can)
study well unless the problem is solved.We do hope you’ll help and support us.

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