1. Yesterday she found this leaflet in her letter-box. 昨天她在信箱里发现了一张宣传单。
2. The key which you posted was in the locked letter-box too. 你邮寄的钥匙也在锁着的信箱里。
3. The postman tried to crush the packet through the letter-box. 邮递员使劲把信件塞进信箱里。
4. There are two collections a day from this letter-box, ie The postman empties it twice a day. 这个信筒每天收信两次(邮递员每天取走两次)。
5. There's no use peering through the letter-box. The place is as still as the grave. They must have forgotten we were coming. 不用朝投信口里张望了,这里静静的没有一点儿声响,他们准把我们来这里的事忘了。