6点40用英语怎么写两种表达

　　There's an age difference of six years between the boys.

　　这两个男孩的年龄相差六岁。

　　My number is six o double three.

　　我的号码是六零三三。

　　He's been out of work for six months.

　　他已经失业六个月了。

　　We started German in year seven.

　　我们在七年级开始学习德语。

　　You should receive a reply within seven days.

　　你会在七天之内收到答复。

　　The performance starts at seven.

　　演出七点开始。