Question

英语高手来下

请帮我下， 然后告诉我为什么要那样填。有加分的。谢谢
用下列介词填空：
in at by of
1.Last year there was a drop ____net sales___9%.
2.Market share increased ____3％ up ____8%.
3.Net sales peaked ____ £22m in 1997.
4.Sales levelled off ____£5m in 1998.
5.Cost rose____£3.3m. This was a rise____10%.
6.Office software sales fall____10% in 1997.
8.A strong pound meant a fall____ exports in 1998

Answer 1

1. Last year there was a drop __of__net sales_by__9%.
   
   2.Market share increased __from__3％ up __to__8%.
   
   3.Net sales peaked _at___ £22m in 1997.
   
   4.European sales went __from__ £4.2m _to__ £3.0m.
   
   5.Sales levelled off __at__£5m in 1998.
   
   6.Cost rose__to__£3.3m. This was a rise_of___10%.
   
   7.Office software sales fall__in__10% in 1997.
   
   8.A strong pound meant a fall_to___ exports in 1998

   这不是我做的，据说是一个老师的答案，可以参考一下，这是不是关于商务英语的呀！