40的英文怎么写的

　　Over the past forty years plastics have revolutionised the way we live

　　在过去的40年中，塑料彻底改变了我们的生活方式。

　　Between forty and fifty people are reported to have died in the fighting.

　　报道称有40到50人在冲突中丧生。

　　He picked up forty of these publications and read each one of them.

　　他从这些出版物中挑选了40本，逐一阅读。

　　Fewer than forty per cent voted — the threshold for results to be valid.

　　投票的人不到40%——投票结果无效。

　　In Rio, nearly forty people have been held to ransom this year alone

　　在里约热内卢，仅今年一年就有近40人被绑票。