39.a increased to... a增长到...

　　40.high/low/great/small/ percentage. 比低高(低)

　　41.there is an upward trend in the number of... ...数字呈上升趋势。

　　42.a considerable increase/decrease occurred from...to... ...到...发生急剧上升。

　　43.from...to...the rate of decrease slow down. 从...到...，下降速率减慢。

　　44.from this year on，there was a gradual declinel reduction in the...,reaching a figure of... 从这年起，...逐渐下降至...

　　45.be similar to... 与...相似

　　46.be the same as... 与...相同

　　47.there are a lot similarities/differences between...and... ...与...之间有许多相似(不同)之处

　　48.a has something in common with b a于b有共同之处。

　　49.the difference between a and b lies in... a与b之间的差别在于...

　　50...(year)witnessed/saw a sharp rise in... ...年...急剧上升。