三的英文单词怎么拼

例句：

1. Three years ago he clerked in a bank.

三年前他在一家银行里当职员。

2. She ticked off three items on the list.

她用记号标出表格上的.三个项目。

3. I had only danced with Mary about three minutes when someone cut in.

我和玛丽刚刚跳了大约三分钟的舞，就有人来截舞。