小测验：选择正确的单词

1. Drop me a line or a postcard when you get a minute.
   有空就给我写封短信或寄张明信片。
2. I got your postcard from the hospital.
   你从医院寄来的明信片我已收到。
3. He earns his living from selling postcard to tourist .
   他的谋生手段是向旅客出售明信片。
4. There are a few postcard sellers by the cathedral .
   大教堂附近有几个卖明信片的人。
5. He runs a profitable sideline selling postcard to tourist.
   他在干一个有收益的副业－－－－向游客出售明信片。

　1个名词解释