帮忙改正英文句子中的语法错误

帮忙改正英文句子中的语法错误
1.Its not clear why customers don’t use this service however we think it should not be discarded yet.
2.if following these steps does not work,ring the support person and ask them why?
3.the questionnaire responses which do not state clearly whether they are in favour of the new proposal are of no use to us and should be discarded.
4 if a staff member cannot answer a customer's query,they should ask the manager for help.
5 New employees who have not recieved training in OHS and emergence procedures,should contact me so I can arrange this for them.
6 On the advise of our legal team,we will except there proposal.
7 I do not know were the document's have been filed,and have asked my assistant to check with our companies central registry.