对下列句子中繁琐的词进行修改!谢谢拉。各位大虾！~~~~~

1.In the event that this does not meet your approval,please notily us as to your wishes
----- If you don't approve,please noyify us.
2.Will you be good enough to sent us your latest catalogue.
------Please send us your latest catalogue.
3.Due to the fact that the above terms are unreasonable,we have to call the deal off.
------We have to call the deal off due to the unreasonable terms above.
4.We have been in this line far a long period of time.
-------We have been in this line for a long time.
5.As you know ,the market of this product is declining at this time.
------As you know, this product is daclining at the market.
6.We're very grateful and approciative for your letter of March,10
-------We have read your letter of March,10
7.Please don't hesitate to get in touch with us in case you have any question.
---------Please contact us if you have any question