请帮我做这几道介词填空题,并且说明做法.
请帮我做这几道介词填空题,并且说明做法.
用下列介词填空:
in at by from of to
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.European sales went ____ £4.2m ___ £3.0m.
5.Sales levelled off ____£5m in 1998.
6.Cost rose____£3.3m.This was a rise____10%.
7.Office software sales fall____10% in 1997.
8.A strong pound meant a fall____ exports in 1998
请说明为什么要这样填,