請將下面這段話翻譯成英文：
1.把整本書都看完美多大用處。
2.我買這枚戒指花了500美元。
3.錯過了火車真令人惋惜。
4.今晚上我給你打電話對你來說合適嗎?
5.作出這樣的準備是必要的，因為無法預(yù)見到洞穴探險者究竟會遇到什么性質(zhì)的困難。
參考答案:
1.It's not very useful to read the whole book.
2.It costed me 500 dollars to buy the ring.
3.It was a pity to miss the train.
4.Will it suit you to call me tonight?
5.Precautions of this sort are necessary,for it is impossible to foretell the exact nature of the difficulties which will confront the pot-holer.
